On Aug 31, 4:08�pm, RickH wrote:
I went to the Jiffy Lube this weekend and thought I'd splurge and put
in some Castrol Syntec as they were having a sale on it, (vehicle 2007
Toyota RAV4). �When I asked for the Syntec the guy said that once you
go to a synthetic oil, you should stay on it and not go back to
regular oil. �Well since the the regular cost of a Syntec oil change
is double, I said forget it and just put in regular oil.

First, is it true what the guy said about it being "bad" to go back to
regular oil after using synthetic? �If so, why? �I had a car in early
the 90's that loved Mobile 1, ran great on it, I dont remember
dedicating that car to Mobile 1 though for all time, I'm sure I used
all different oils.

Thanks
Rick

I wouldn't think it would matter or there would be a warning on the
label. Anyway, how long will you own that car? Most of todays cars can
run 200-300K without any major problems. Why pay the extra? No one hs
ever asked me what kind of oil I used when they were buying a car (or
anything witha motor) from me.

Hank