Originally Posted by tjkj2002
There is zero difference in start up protection between 5w-20 and 5w-30 as both start as 5 weight oil when cold.When at operating temps is when the difference is since the 5w-20 will be 20 weight and 5w-30 will be 30 weight.
You want thinner oil for very cold start ups(-30 degrees and below) then you want to look at 0w-30 oil.
yep, technically you are right
...but if you actually look/feel/touch 5w-20 vs 5w-30 I believe you really can tell the difference....that said, I moved from Denver to Houston and will probably switch to 5w-30 because its so freakin HOT here