DMONEY06

iTrader: (2)

ok i was told that once you use synthetic oil you cant switch back to conventional because it would leak through the valve seals is this true or can you switch back to conventional with no problem??? thnx

COD02SS

You can switch back. No worries.

smokintiresz28

i heard the same but is it fact or myth

sroach20

iTrader: (31)

its a myth! you can switch back and forth all you want.

C5LS6

Wow, there is actually a myth like that out there?? Wow!

dbuie

I heard that whenever I was 22 and got my first new car. Now I'm 39. Also, I have always been told to not switch to synthetic on a high mileage (>100K) car. Synthetic is thinner and old cars are more prone to leak.

teke184

iTrader: (5)

i was told by someone once that the when synthetic first came available, there was some concerns over the compatibility between them with conventional.

i'm sure it was something more of a guidline at first...but has long since been corrected.

if it were true...don't you think there would be a warning on the labels? can you imagine the legal backlash that would come from mixing the two if it were indeed a problem?

if you could sue for having too hot of a coffee, you could sue for a new engine cause the oil was not compatible.

COD02SS

It's as bad as "Don't use synthetic to break in an engine"

bombloader

iTrader: (1)

I wouldn't switch TO syn on a high mileage engine. I will leak through the old gaskets.

DMONEY06

iTrader: (2)

thnx for the info im probably gonnna switch back to conventional oil

JedWele

I have run synthetic in all my vehicles some with very high miles, never had a oil leak from sythetic.

DirtyBird222

iTrader: (7)

man only if everyone knew what lube techs did at dealerships lol. the past two dealerships i've worked at the dumbasses mix and match synthetic and conventional 1) becaue they usually forget 2) so they can change their oil for free by stealing the customers oil or 3) they just feel like being dipshits.

really i dont think it makes a difference, ive never had any problems when i've had to change my oil and been low on cash and had to use conventional. you should be fine

sroach20

iTrader: (31)

the dealers arent the only ones that do that!

ch3089

iTrader: (2)

Dave from Rehr and Morrison race engines wrote an article about synthetics in certian cars and the viscosity that he uses and recommends!!!

bombloader

iTrader: (1)

Sounds like good reading. Do you have the link?