Reply to "5w20 vs 5w30"

mgbv8Member

Hi Buster

Fuel dilution is a start up issue - thick oil fuel - thin oil less fuel again Synth Dino/ or thin dino?

No engine failure - we are looking for optimum.

Another preconception
US drive for miles at 60mph
UK will thrash a car in all gears up to 140+mph

Spec an oil or both markets?

If you track a car say at weekend 5W20 appropriate?

Even my old designed V8 can use a 5W20 at 0F

Setting aside CAFE and preconceptions - best viscosity additives etc for circumstances is the goal.

At the moment even start up wear remains a unexplained, let alone additive pressure/temperatue effectiveness.

10/21/056:37 PM

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