Pennzoil HD40 decent for any 40 weight multi spec
- Thread starter Plumber
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Not if you want to start it in the winter.
Assuming that you intend to use this oil in cars only used during the warmer months, it would probably be okay.
It would probably be a good top-up oil for my old BMW, since from my own UOA as well as others I've seen, the M42 seems to do a pretty good job of fuel diluting and shearing a 10W-40 to a 10w30.
It's actually among the grades listed in the OM of our Forester, although I don't think I'd use it more than ten degrees to either side of the equator.
It would also be okay for flathead OPEs used during the warmer months, like a lawnmower or a tiller.
I might drop by a couple of AZs on our shopping/errands route today and see what I can find.
It would probably be a good top-up oil for my old BMW, since from my own UOA as well as others I've seen, the M42 seems to do a pretty good job of fuel diluting and shearing a 10W-40 to a 10w30.
It's actually among the grades listed in the OM of our Forester, although I don't think I'd use it more than ten degrees to either side of the equator.
It would also be okay for flathead OPEs used during the warmer months, like a lawnmower or a tiller.
I might drop by a couple of AZs on our shopping/errands route today and see what I can find.
This won't hurt much, it will be slower to get to operating parts, and will make the engine harder to crank, even in mild temps, there are better choices. I would use a good multi grade HDEO in your classic engine. you won't save a lot of $$ by using the monograde.
Now, I happen to have a case of 40wt Pennzoil....happens to be perfect for the Bijur chassis lubrication system.
Now, I happen to have a case of 40wt Pennzoil....happens to be perfect for the Bijur chassis lubrication system.
If you only drive it in temperatures above freezing, sure. It'll also be fine for outdoor power equipment used in the same temperature range.
JHZR2
Staff member
This is a good depiction of the temperature range where straight oils can be used:
I've seen 40wt used in marine diesels, with the recommendation that the engine be idled until oil is to temperature. It's not followed necessarily.
Having recently poured and wiped some 20w-50 in near freezing temperatures, I'd not want a straight 40wt anywhere below what is shown in that picture.
I've seen 40wt used in marine diesels, with the recommendation that the engine be idled until oil is to temperature. It's not followed necessarily.
Having recently poured and wiped some 20w-50 in near freezing temperatures, I'd not want a straight 40wt anywhere below what is shown in that picture.
HD40 in a '64 T-Bird is good lubrication.
I used a mix of 2qts. SAE 30 and 3 qts. SAE 40 in my Chevy truck one summer, and the truck never even noticed it. Over night lows were 80, highs around 100.
Same with a local AZ, only Castrol GTX. Picked up 2 quarts, figure it will be just fine as a top off oil in my Camry, during moderate months.
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