Doing my next change this weekend, been thinking of going to synthetic....
The '0' grade will only benefit if you live in the Artic circle (or Russia as the case has been this winter). A quality synthetic '5' grade will pour in the -40's range. Amsoil 5w30 pours down to -60.Boca_Yid said:The colder your winter climate is, the lower the first number should be.
Never get below freezing? 10W-nn or higher will be ok.
Freezing temps, use the 5W-nn.
Super cold (below 0f all day & night), go to a 0W-nn.
Indeed it does as I did mention I was using 10w40 in Texas. However, I was actually referring to the filter.when I referred to OE equipment..... :wink:Boca_Yid said:Actually, the owner's manual specifies different oil weights for HD service.