everybody is going to cuss me i already can tell, but dad always put ph3600 frams on mine from walmart, and i pretty much kept it up, when i rebuild the engine im going w/ wix. oil wise he ran 530 pennzoil, i switched to 530 castrol gtx, regular stuff has served me well, and the engine revved out better and idled smoother when i switched to the castrol. ive used 1030 and 1040 as well when the 530 wasnt available at autozoo, the 1030 down here in louisiana didnt make a dif, up north the one time in pa it was harder to start. the 1040 i used in florida the one time and i actually seemed to lose power and my engine temperature went up, so i changed it out as soon as 530 was available. i always run 530 now and will continue w/ the castrol and change to wix filters. when i rebuild my motor im going to run 2 break in oil changes of mineral oil, then go one tim syntec blend, then synthetic if the seals are good.