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Post Info TOPIC: changing oils in newer vehicles regular or synthetic


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changing oils in newer vehicles regular or synthetic
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Not really hot rod related but I'm looking for some input. I'm changing all the gear oil in the diffs and tranny and t case on my 2009 Toyota Tacoma. and the manual calls for 75-90 but all I can locate at any stores is 75-90 synthetic.  always heard that you can't use synthetic after using regular as it damages seals? thoughts ?



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DUNDAS, ONT

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Damaging seals is a load of crap it will clean the hell out of anything you put it in thats the problem with older engines.  To make it short unless your 2009 sealing system has already been compromised and grime and sludge is keeping it from leaking it will be fine



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SCARBOROUGH, ONT

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maybe maybe not

in my front wheel drive dodge transmissions the early ones only get dino oil the later ones can take the synthitic

difference is in the parts inside the syncros in the early trans as they don't react well to the synthitic

so yes it could make a difference

if the trans is good as is I'd save my money and keep using what you already do just to be safe and avoid issues you never needed

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FORT ERIE, ONT

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I think it's more important to make sure that your gear boxes need GL-4 or GL-5 oil. GL-5 oils tend to contain sulphur-based additives, which can deteriorate copper alloys.

The Difference between GL-4 and GL-5 Gear Oils

I would check with your owner's manual or factory service manual to determine exactly which oil is specified for each application.



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BELLEVILLE, ONT

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IICR the manual will call for GL-5. That's what you need to look at. Not all gear oil is the same.


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