Originally Posted by Jackson_Slugger
Originally Posted by tundraotto
Originally Posted by Jackson_Slugger
Originally Posted by tundraotto
The owners manual recommends straight 30W oil for the vehicle at above 40F degree temperatures.
Em, if we're talking about a 429 cu. inch 7.0L, the manual recommends nothing heavier than 10W-30 or "SAE20" above freezing (32F, 0C). Below 0F, they recommended 5W-20 (or 5W)...
The interval was 60 days, but not to exceed 6,000 miles...
I would use Rotella T5 10W-30 or Mobil 1 HM in the same weight...
In 1966 the 429/7L V8 - the The owners manual recommends straight "30W oil for the vehicle at above 40F degree temperatures."
I wouldn't be surprised if a 1966 429 V8 went through 10W-30 oil like a sieve, but that's just guess.
And your source is? The Cadillac manual stated that 10W-30 was used from 0F to above. It made no mention of SAE 30, and said you could also use SAE 20 above 32F. Feel free to post your source, mine is page 42...
I'd be more worried about that eras lack of hydrocracked 5W-20's below freezing...
What year is that 'manual'? This is a 1966. Not too many 5W-20 made back then. I'll find the page....