Synthetic seems to smoke less when burned,
but it's much more likely to slip by loose seals,
so I'd stay with the Castrol. It's never let me down...
my '02
Toby
> Hi listers,
>
> Just a quick question to all the wise fans out there. My U20 has exibited
> signs of worn valve seals since I purchased the car many years ago. Due to
>the
> fact that it shows good compression evenly and it runs so good I have put off
> the replacement for years. For years I was running Castrol 20/50 and as of
> recently switched to hi mileage 20/50 which seems to be slowing down the oil
> burn off. Not so much of the puffy blue smoke on take off. Do you think
> switching to synthetic will improve the burn off properties any more?
|