frank_f15
Super Member, Rest in Peace
DECIDED TO POST THIS QUESTION ON THIS FORUM,probably gets the most hits.my manual call for 10w-30 or 10w-40, very hard to find. can find 15w-40 easily. my question is how much difference can this possibly make? i mean 10w vs.15w cna't make that much diff. tractor is garage kept, average winter temp is 15 to 30 deg. with a few days in the single digits. don't want to start a oil war on brands and such just a simple ans. IS THERE THAT MUCH DIFF?