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Synthetic Auto Oil vs Conventional and finding Conventional Oil
Posted by: Microman
Date: May 18, 2022 08:28AM
I have been looking locally for some 5-30 conventional oil to do a oil change in this 2005 high mileage Toyota Corolla. Cant find any at Walmart, or Home Depot. Did buy Some High Mileage 5-30 at Home Depot, and Costco.

I suppose I could go with Autozone and pick up conventional 5-30 for about $5 more for 5 qt container.

Are they changing to only carrying Synthetic?, And will all cars take this change OK?
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Re: Synthetic Auto Oil vs Conventional and finding Conventional Oil
Posted by: Speedy
Date: May 18, 2022 09:02AM
Yes, all cars can take synthetic motor oil.



Saint Cloud, Minnesota, where the weather is wonderful even when it isn't.
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Re: Synthetic Auto Oil vs Conventional and finding Conventional Oil
Posted by: cbelt3
Date: May 18, 2022 09:07AM
Totally safe. It used to be a problem 20 years ago, but they fixed that issue. And yeah.. motor oil is more expensive, just like all fossil fuel based products.
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Re: Synthetic Auto Oil vs Conventional and finding Conventional Oil
Posted by: ztirffritz
Date: May 18, 2022 09:10AM
Why would you want non-synthetic oil?



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Re: Synthetic Auto Oil vs Conventional and finding Conventional Oil
Posted by: Cary
Date: May 18, 2022 09:16AM
Quote
ztirffritz
Why would you want non-synthetic oil?

That’s what I was going to ask. We only use synthetics.
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Re: Synthetic Auto Oil vs Conventional and finding Conventional Oil
Posted by: mrbigstuff
Date: May 18, 2022 09:24AM
it used to be synthetics were almost double of conventional oils (in fact, I bet that the quick change oil places still charge a premium of nearly double), but as noted, the fossil fuel thing is really putting a hit on Dino oil. still more expensive, just less so.
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Re: Synthetic Auto Oil vs Conventional and finding Conventional Oil
Posted by: Filliam H. Muffman
Date: May 18, 2022 09:28AM
The reason to not use synthetics:
- conventional is slightly cheaper
- if you have a car that was made before leaded gas was banned
- you might have slightly higher oil consumption in a car that only used non-synthetics.



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Re: Synthetic Auto Oil vs Conventional and finding Conventional Oil
Posted by: N-OS X-tasy!
Date: May 18, 2022 12:46PM
Quote
Filliam H. Muffman
The reason to not use synthetics:
- if you have a car that was made before leaded gas was banned

What does that have to do with anything?



It is what it is.
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Re: Synthetic Auto Oil vs Conventional and finding Conventional Oil
Posted by: Filliam H. Muffman
Date: May 18, 2022 04:04PM
Quote
N-OS X-tasy!
Quote
Filliam H. Muffman
The reason to not use synthetics:
- if you have a car that was made before leaded gas was banned

What does that have to do with anything?

It usually means the engine needs an oil with high zinc/phosphorus for lifters, camshafts, and/or valve seats, like Valvoline VR1 Racing, Castrol GTX Classic, or Royal Purple Break in. Being built/rebuilt with more modern hardened components eliminates the need for extra zinc.



In tha 360. MRF User Map
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Re: Synthetic Auto Oil vs Conventional and finding Conventional Oil
Posted by: N-OS X-tasy!
Date: May 18, 2022 04:34PM
Quote
Filliam H. Muffman
Quote
N-OS X-tasy!
Quote
Filliam H. Muffman
The reason to not use synthetics:
- if you have a car that was made before leaded gas was banned

What does that have to do with anything?

It usually means the engine needs an oil with high zinc/phosphorus for lifters, camshafts, and/or valve seats, like Valvoline VR1 Racing, Castrol GTX Classic, or Royal Purple Break in. Being built/rebuilt with more modern hardened components eliminates the need for extra zinc.

None of the components you mentioned have anything to do with leaded gas. Is this this a case of coincidental congruence or are other factors at play?



It is what it is.
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Re: Synthetic Auto Oil vs Conventional and finding Conventional Oil
Posted by: chopper
Date: May 18, 2022 08:55PM
It's always super-great humor when these things come up here.
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Re: Synthetic Auto Oil vs Conventional and finding Conventional Oil
Posted by: N-OS X-tasy!
Date: May 18, 2022 09:25PM
I feel like we had this discussion very recently.



It is what it is.
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Re: Synthetic Auto Oil vs Conventional and finding Conventional Oil
Posted by: mrbigstuff
Date: May 18, 2022 09:34PM
Quote
N-OS X-tasy!
Quote
Filliam H. Muffman
Quote
N-OS X-tasy!
Quote
Filliam H. Muffman
The reason to not use synthetics:
- if you have a car that was made before leaded gas was banned

What does that have to do with anything?

It usually means the engine needs an oil with high zinc/phosphorus for lifters, camshafts, and/or valve seats, like Valvoline VR1 Racing, Castrol GTX Classic, or Royal Purple Break in. Being built/rebuilt with more modern hardened components eliminates the need for extra zinc.

None of the components you mentioned have anything to do with leaded gas. Is this this a case of coincidental congruence or are other factors at play?

Yeah, perhaps you are thinking of a two-stroke motor, Filliam? Not that leaded is needed there, either.



Edited 1 time(s). Last edit at 05/18/2022 09:36PM by mrbigstuff.
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Re: Synthetic Auto Oil vs Conventional and finding Conventional Oil
Posted by: Filliam H. Muffman
Date: May 19, 2022 12:45AM
I guess I should have specified it is close to the same general time frame. RollingEyesSmiley5



In tha 360. MRF User Map
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Re: Synthetic Auto Oil vs Conventional and finding Conventional Oil
Posted by: N-OS X-tasy!
Date: May 19, 2022 01:35AM
Quote
Filliam H. Muffman
I guess I should have specified it is close to the same general time frame. RollingEyesSmiley5

Perhaps you should have.



It is what it is.
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Re: Synthetic Auto Oil vs Conventional and finding Conventional Oil
Posted by: Racer X
Date: May 19, 2022 03:08AM
you can order Amazon Basics conventional oil if it really matters to you. If you want conventional oil with the EP additives, diesel oil is what I do, usually 15w-40 in my convertible Buick. The rebuilt Gran Sports get synthetic. None need lead or lead substitutes added to the fuel as Buick used a much higher quality nickel-rich iron in their blocks and heads. Even in high output engines under heavy loads, they don't suffer from valve recession.



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Re: Synthetic Auto Oil vs Conventional and finding Conventional Oil
Posted by: Speedy
Date: May 19, 2022 04:41AM
Quote
chopper
It's always super-great humor when these things come up here.
big grin smiley

Quote

diesel oil is what I do, usually 15w-40.

All my ICE engines use Mobil 1 Turbo Diesel Truck 0W-40.



Saint Cloud, Minnesota, where the weather is wonderful even when it isn't.
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Re: Synthetic Auto Oil vs Conventional and finding Conventional Oil
Posted by: Bill in NC
Date: May 19, 2022 02:49PM
Plan on replacing a lot of gaskets if you switch over to synthetic on a vehicle that old.

When I did so after dad gave me his 1998 SL500 I ended up having the valve cover gaskets replaced twice.

Then after giving it to one of my kids to use during college they ended up having to take it to a specialty shop near their school to have the engine opened up & replace all seals, including one where the leak was dripping directly onto the exhaust manifold...fine when in motion, cloud of oil smoke when stopped.



Edited 3 time(s). Last edit at 05/19/2022 02:50PM by Bill in NC.
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Re: Synthetic Auto Oil vs Conventional and finding Conventional Oil
Posted by: Dennis S
Date: May 19, 2022 03:11PM
My brother just changed from conventional to synthetic in my 1998 Camry without checking with me. It had never leaked or burned a drop. A few days later it had leaked about a teaspoon of more on the carport each time I looked (twice). I got so disgusted I drove it into the yard and haven’t looked at it since. I don’t give a damn what the “experts” say, I’ve seen it happen with my own eyes. And don’t say “ correlation doesn’t equal causation.”
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Re: Synthetic Auto Oil vs Conventional and finding Conventional Oil
Posted by: btfc
Date: May 19, 2022 03:38PM
Quote
chopper
It's always super-great humor when these things come up here.

Is that why every thing you post is a joke?
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Re: Synthetic Auto Oil vs Conventional and finding Conventional Oil
Posted by: Yoyodyne ArtWorks
Date: May 19, 2022 08:05PM
Quote
N-OS X-tasy!
Quote
Filliam H. Muffman
Quote
N-OS X-tasy!
Quote
Filliam H. Muffman
The reason to not use synthetics:
- if you have a car that was made before leaded gas was banned

What does that have to do with anything?

It usually means the engine needs an oil with high zinc/phosphorus for lifters, camshafts, and/or valve seats, like Valvoline VR1 Racing, Castrol GTX Classic, or Royal Purple Break in. Being built/rebuilt with more modern hardened components eliminates the need for extra zinc.

None of the components you mentioned have anything to do with leaded gas. Is this this a case of coincidental congruence or are other factors at play?

Zinc and phosphorous don’t play nice with catalytic converters:

[www.motorweek.org]



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Re: Synthetic Auto Oil vs Conventional and finding Conventional Oil
Posted by: N-OS X-tasy!
Date: May 19, 2022 09:41PM
Quote
Yoyodyne ArtWorks
Quote
N-OS X-tasy!
Quote
Filliam H. Muffman
Quote
N-OS X-tasy!
Quote
Filliam H. Muffman
The reason to not use synthetics:
- if you have a car that was made before leaded gas was banned

What does that have to do with anything?

It usually means the engine needs an oil with high zinc/phosphorus for lifters, camshafts, and/or valve seats, like Valvoline VR1 Racing, Castrol GTX Classic, or Royal Purple Break in. Being built/rebuilt with more modern hardened components eliminates the need for extra zinc.

None of the components you mentioned have anything to do with leaded gas. Is this this a case of coincidental congruence or are other factors at play?

Zinc and phosphorous don’t play nice with catalytic converters:

[www.motorweek.org]

I just… can’t.



It is what it is.
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Re: Synthetic Auto Oil vs Conventional and finding Conventional Oil
Posted by: Filliam H. Muffman
Date: May 20, 2022 09:38AM
Quote
Yoyodyne ArtWorks
Quote
N-OS X-tasy!
Quote
Filliam H. Muffman
Quote
N-OS X-tasy!
Quote
Filliam H. Muffman
The reason to not use synthetics:
- if you have a car that was made before leaded gas was banned

What does that have to do with anything?

It usually means the engine needs an oil with high zinc/phosphorus for lifters, camshafts, and/or valve seats, like Valvoline VR1 Racing, Castrol GTX Classic, or Royal Purple Break in. Being built/rebuilt with more modern hardened components eliminates the need for extra zinc.

None of the components you mentioned have anything to do with leaded gas. Is this this a case of coincidental congruence or are other factors at play?

Zinc and phosphorous don’t play nice with catalytic converters:

Neither does leaded gas.



In tha 360. MRF User Map
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Re: Synthetic Auto Oil vs Conventional and finding Conventional Oil
Posted by: Yoyodyne ArtWorks
Date: May 20, 2022 10:01AM
Quote
Filliam H. Muffman
Quote
Yoyodyne ArtWorks
Quote
N-OS X-tasy!
Quote
Filliam H. Muffman
Quote
N-OS X-tasy!
Quote
Filliam H. Muffman
The reason to not use synthetics:
- if you have a car that was made before leaded gas was banned

What does that have to do with anything?

It usually means the engine needs an oil with high zinc/phosphorus for lifters, camshafts, and/or valve seats, like Valvoline VR1 Racing, Castrol GTX Classic, or Royal Purple Break in. Being built/rebuilt with more modern hardened components eliminates the need for extra zinc.

None of the components you mentioned have anything to do with leaded gas. Is this this a case of coincidental congruence or are other factors at play?

Zinc and phosphorous don’t play nice with catalytic converters:

Neither does leaded gas.

I was agreeing with you, cars that use leaded gas can benefit from the higher zinc/phosphorous content in the specific oils you listed. But it’s also worth mentioning that most conventional (non-synthetic) oils on the market today are fully compatible with cars that use unleaded gas and have catalytic converters, as they don’t contain the higher levels of zinc/phosphorous that the oils you list contain. So people shouldn’t assume that ANY conventional oil will automatically be better for their old leaded-gas burning vehicle than a modern synthetic oil.



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