I feel 3K is a bit short, I shoot for closer to 5-7K (and change the filter
IMO the issue is not so much dirt and moisture (the oil filter traps the
significant dirt, the moisture boils off when the oil reaches the proper
temperature) but that the various additives still have a limited lifetime.
I use Valvoline synthetic, mostly because it greatly reduces oil burning in
my 200K+ mile POS Chevy. (Which BTW started burning oil when I temporarily
switched from Valvoline Racing to Castrol.) I use it in the TR3 on the
thought (probably wishful) that it _may_ reduce wear. It does seem to
reduce the amount of oil blown through the fill cap, which presumably means
it is reducing blow-by under load. At $4/quart, it isn't a large part of
my operating costs.
59 TR3A "daily driver wanna be"
On Wednesday, August 25, 1999 4:56 PM, Beth and Ken
> I see there seems to be some discussion about the merits of synthetic
> My biggest problem with it is that because of its durability, people
> to leave it in longer (isn't that the reason to spend more in the first
> place?). Well, I believe that dirt and moisture contaminate synthetic oil
> the same rate as the "real" stuff. I believe that whatever you have in
> should come out every 3,000 miles. Watcha think?
> ken shapiro
> 1970 GT6+ KC81872L