My 17 GT runs just fine with 5w20 but I am hard on it at times and while 5w20 has long proven itself, is it the best choice for a fairly high strung V8? For 2018 ford made changes to the Coyote V8 but I imagine the clearances are similar. The 18 manual states to use 5w30 on the track but switch back to 5w20 on the street. Surely that has to be CAFE driven. My car holds 8 quarts. I was thinking of going 4 quarts of 5w20 and 4 quarts of 5w30.
Or maybe just a full fill of 5w30. I know mixing is usually not a big deal. I just wonder if there are any chemistry differences that would ultimately make the mix less effective vs just picking a weight and running it.
I know I’m over thinking this lol!
What are your thoughts?
Or maybe just a full fill of 5w30. I know mixing is usually not a big deal. I just wonder if there are any chemistry differences that would ultimately make the mix less effective vs just picking a weight and running it.
I know I’m over thinking this lol!
What are your thoughts?