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Discussion Starter · #1 ·
Read all the posts on oil. Synthetic, non-synthetic, 5W20/30/40, 10W20/30/40, etc...

Mobil, Castro, Valvoline, Amsoil, etc...

I do like the synthetic idea and I do live in New Mexico (only gets down in the 20s at the lowest). So I am pretty sure a 20 degree oil will work for me, but DAMN!

My decision isn't any easier!

Any GT owner from way back have a good suggestion for what to put in #5508 in 20-100 degree weather? Also, what about synthetic oil?
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