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Originally Posted by Bob In Ct
Mobil1 does not come in 10W-40.
The 0W-40 is actually heavier at lower temperatures than is the 5W-30. It's also heavier at high temps, which you would expect. I use the 5W-30 Mobil1 year round with lots of pressure even in the heat.
It's all on their site at www.mobil1.com
Bob |
Sorry, I meant 5W40 truck/diesel
synthetic. A bit hard to keep track, I do ALL
oil changes in 6 vehicles. I put it in when I got the car in March, 1600 miles ago.
I don't understand how 0W40 can be heavier (thicker) in lower temps than 5W30. Doesn't the first number indicate viscosity at a given low temp?