which stores are you guys buying your 5w50 synthetic for the gt500
I was able to find Mobil 1 5W50 at NAPA. They had it on sale for $5.79/qt through March.
I prefer the Rotella Synthetic 5W40 over the Amsoil, Motorcraft or M1 for various reasons. Lab results show it is holding up very well and a good real world use viscosity match.
I recently called a known speed shop near Montreal. The employee at the service told me to put Rotella 5w-40 in my mustang. He said that Ford put 5w-50 due to the regulation on the pollution emitted... !? I don't know what to think about the 5w-40...
They have made it for a while but mostly stocked in Europe. Some places carry it in the US but not many
I'll stick with my amsoil
Mobil 1 makes a 5w50? That must be new..
Unleashed in 5, 4, 3, 2, ..... Op you're about to get an AMsoil lecture
oil pressure @ start up with 5w-50 is about 100psi. drop to 10w-40.
I prefer the Rotella Synthetic 5W40 over the Amsoil, Motorcraft or M1 for various reasons. Lab results show it is holding up very well and a good real world use viscosity match.
Actually they've made it for a while, just most places don't stock it unless special ordered.
I went to my local NAPA, ordered three cases (18qts) last week when it was on sale, and they had it the very next day for me.
Ran Mobil 1 0W-40 for my first oil change with great results
but the price is substantially more then Amsoil when you buy the preferred customer package