>> But that doesn't explain why 10-30W is not good for it. Although the hp >> output of the mower may exceed that of my van....... :-) >HP isn't the criterion, its the internal design of the bearing, engine >lube pressure, I was joking :( >10-30W could be far too low viscosity under cold conditions. I seldom mow my lawn when it is snowing <g> >Think of the origins of the classification system - a large body of >knowledge about straight oils and little if >any about multi-weight oils. Are you inferring that no one knows anything about multiweight oil? >Another tip is to trust that design engineers know a little bit more >about what they've designed than they are usually >given credit for, especially when it comes to Vanagons! I am a design engineer, and I wouldn't trust anyone blindly about anything.... So I should blindly trust one engineer who makes a great car, and ignore the ones who make the oil?
Still no answers on why anyone should use straight weight over multigrade? At higher temps, is 20-50W the same viscosity as just 50W? Thanks, John |
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