I don't know about the best, but I've heard that the synthetic oil is good for older, higher mileage engines.
What's the best oil for auto cars with 100k+ miles.
Specifically 4.0L V6
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I don't know about the best, but I've heard that the synthetic oil is good for older, higher mileage engines.
The journey of a thousand miles must begin with a single step.


I'd go semi or full synthetic. Weight depends on climate and engine compression, or things like leaky valvestem seals.
5w-30 for an engine in good shape is fine, 10w-30 for warmer weather - etc. Either one of those should fit most situations.
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Last edited by ROID; 04-17-2009 at 06:47 PM.
" A cookie without sugar is just a cracker" ~ ancient voodoo proverb
"A man with infinite patience is never left waiting."~ROID's past incarnation
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ASIA PHARMA GMP
BRITISH DRAGON GMP
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" A cookie without sugar is just a cracker" ~ ancient voodoo proverb
"A man with infinite patience is never left waiting."~ROID's past incarnation
NOW AVAILABLE!!!
Super-DMZ Rx™ Pro-Hormone (Superdrol Dymethazine)
ASIA PHARMA GMP
BRITISH DRAGON GMP
FREE SAMPLES
OFFER AND KITS- BUY 1 GET 1 FREE
You are wise great wise one.
I do need to get on the ball. playing with fire
" A cookie without sugar is just a cracker" ~ ancient voodoo proverb
"A man with infinite patience is never left waiting."~ROID's past incarnation
NOW AVAILABLE!!!
Super-DMZ Rx™ Pro-Hormone (Superdrol Dymethazine)
ASIA PHARMA GMP
BRITISH DRAGON GMP
FREE SAMPLES
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The journey of a thousand miles must begin with a single step.
where you live 75% of the time your oil will only be at the 30 weight viscosity due to your climate , buy a 10w-30 with a detergent in it , do not add any extra gasoline additives to your car , they will reck your cat
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It really depends on the current condition of the engine. With 100+K on it you more than likely have gunk built up in the returns and passages. Synthetic will loosen this up and like arteries you could cause blockage somewhere down the line. Also, if your burning oil now synthetic will likely increase the rate you burn through oil.
I would stick with a good dino oil if the engine is running well now.
Synthetic is great for low mileage engines that don't have a lot of wear on them. It definitely helps reduce wear over time. Once worn it's not suggested.
If you decide to run it anyway just keep an eye on oil consumption and also change the oil and filter after 1-2K miles to remove any freed up particles.
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