So I plan to use 5qts of PP 5w20 at the next oil change for my truck. Problem is that it takes 7-8qts total (spec is 7.7). I have Plenty of QSUD stocked to top the fill with. I know it Won't cause any problems but are these as similar as they sound? picked the PP up for a steal but could use it to top up instead or in the cars next oci for further cleansing.
In other words are PP and QSUD very similar with compatible add packs or should I just got with straight QSUD?
In other words are PP and QSUD very similar with compatible add packs or should I just got with straight QSUD?