does it matter what brand you use. I bought Peak(performance motor oil with thermal breakdown) sae 10w-40, I went to the store and they didn't have that brand, so I got another brand called walco (deluxe sae 10w-40 motor oil) I don't want to mess my car up. I am new to driving.
I have a 1997 gmc 2500 4x4 pu with a 5.7 gas plow truck with 75000 miles should I switch over to mobil 1 is it better then just oil or what oil should I use
I don't know where my head was at the moment, but I accidentally put 10w40 into a mower that already that had a little bit of sae 30 oil already in it. I realized it before I started the mower. Obviously, I know you should use sae 30 oil and that you wouldn't want to use 10w40 in the mower...