Ditto ......
.
been using Mobil 1 for a while ......... 5w30 ........ 10w30 .......
.
whatever I can find ........
.
a 5qt container is avail at Walmart for under $20 ........
.
In addition to Mobil 1 and Royal Purple, Amsoil is also a frequently mentioned ......... it tests as good or better than just about anything available ........