<VV> re: 4 speed synthetic oil or not?
Sun, 2 May 2004 14:08:34 EDT
Usually the factory spec for this is 80W-90, so switching to a 75W-90
synthetic should produce an immediate improvement in cold weather shifting. When
I first drove my 1965 180 in the winter I could hardly get into 2nd gear
until the gearbox warmed up so for the first few miles I had to go 1st to 3rd
gears. Once I switched the original lube to Amsoil 75W-90 the problem disappeared
and I could get into 2nd gear on the first upshift of the cold morning on the
way to work. In addition, of course, the synthetic lubes have a much better
capability for high temperatures so they are good for racing or other high
performance applications. If you have a limited slip differential, just be sure
to check that the synthetic you use is suitable for positraction. If not, you
may have to put in an additive with the synthetic.
Using vacuum, you can suck out the old oil and using a few psi pressure
you can install the new lube. Just do it in the warmer months of the year!
In a message dated 5/1/04 10:10:17 AM Eastern Daylight Time,
Is there any reason to stay away from synthetics? What is the best oil
for the 66 Saginaw?