Disadvantages of fully synthetic oil?
06 December 2002, 11:26 AM
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Just wondering what they are (except price)and why not all manufactures recommend it for their cars - including Subaru!?
I was told by a Porsche mechanic that it isn't worth the extra cost over semi synthetic oil and he said something about deposits building up to the detriment of the engine... Anyone shed any light on this?
I was told by a Porsche mechanic that it isn't worth the extra cost over semi synthetic oil and he said something about deposits building up to the detriment of the engine... Anyone shed any light on this?
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06 December 2002, 04:05 PM
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Subaru have no problem with you using fully synth provided it is the correct grade.
They recommend a semi synth as it is half the price and this keeps running cost figures lower.
They recommend a semi synth as it is half the price and this keeps running cost figures lower.
06 December 2002, 04:45 PM
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Thanks, I guess calling him a Porsche mechanic wasn't technically correct. He's a mechanic at an independant Porsche specialist...
So, there are absolutely no downsides to fully synthetic oil and it is better than semi in every way and worth every extra penny (in your opinions)?
So, there are absolutely no downsides to fully synthetic oil and it is better than semi in every way and worth every extra penny (in your opinions)?
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07 December 2002, 04:06 PM
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Can only guess what he meant : If you use a mineral oil for a long period it tends to build up deposits. If you move to a fully synthetic oil it breaks down these deposits, some of which may be serving a useful purpose in blocking holes, etc. These deposits would then also clog up the filter. Lay mans understanding this.
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