20W-50 "multi-grade" means it behaves like 20W at room temperature and 50W
when it's hot; i.e., not as much change in viscosity as a straight 20W.
Multi-grades break down faster than single weight oils and are not
recommended by new car manufacturers, although in cold weather it might be
advisable anyway. I have used synthetic 20W-50 for a long time in my hi-po
motor but change it fairly often.
-----Original Message-----
From: tigers-bounces+rpalmerbob=roadrunner.com@autox.team.net
[mailto:tigers-bounces+rpalmerbob=roadrunner.com@autox.team.net] On Behalf
Of A. C. Tynes
Sent: Thursday, October 25, 2007 11:35 AM
To: tigers@autox.team.net
Subject: Re: [Tigers] CASTROL SYNTEC 20W-50-a highzinc formula specially
engineered for classic engines.
20W-50 seems heavy for a small block Ford of any age, except maybe under
some all-out racing conditions. What weight does Dr. Mayf use in the
Bonneville car?
A. C. Tynes
_______________________________________________
rpalmerbob@roadrunner.com
Tigers@autox.team.net
http://autox.team.net/mailman/listinfo/tigers
_______________________________________________
Tigers@autox.team.net
http://autox.team.net/mailman/listinfo/tigers
|