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Mod | | | Forums66 Topics128,136 Posts1,056,745 Members48,454 | | Most Online14,466
Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
Lots of work on Brad's part ... pure enjoyment (and references) for you!
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For helping keep this great
old truck web site
on the Internet for over 30 years! and not clogged down
with Ads!  Again, thanks!
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#69791 12/10/2006 3:20 AM | Joined: Jul 2006 Posts: 707 Shop Shark | | Shop Shark Joined: Jul 2006 Posts: 707 | What say you? I recall reading somewhere that Diesel spec 14W40 oil is actually better for my old engine than the single-viscosity called for in the owner's manual. And, I get it in quantity for other stuff. What say the gearheads?
1951 3800 Be the change you want to see. -hotshoe
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#69792 12/10/2006 3:43 AM | Joined: Jul 2006 Posts: 327 Wrench Fetcher | | Wrench Fetcher Joined: Jul 2006 Posts: 327 | I got a lot of advice on here and read all the threads I got rotella 15 40 from shell at canadian tire it has the Apl plus an ingredient in it it was on sale a while back for $11.00 for 4 litres.. Peter Welcome fellow bc er. Do you know where i can get a 1954 bc licence plate ??? | | |
#69793 12/10/2006 4:13 AM | Joined: Feb 2004 Posts: 29,841 Kettle Custodian (pot stirrer) | | Kettle Custodian (pot stirrer) Joined: Feb 2004 Posts: 29,841 | 20W50 would be better, but the 15-40 is OK. Since all multi-viscosity oils stay at their minimum weight rating all the time, and only lubricate like heavier oils at higher temperatures, the 15-40 is only half as thick as the straight 30 weight the original specifications reccomend. That will result in somewhat lower oil pressure, particularly if the engine in question has some bearing wear. It will probably lubricate OK, but expect to experience lower than usual oil pressure.
Jerry
"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!
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