Originally Posted By: Vspec
I hate to be that guy but what about using this as a additive booster with another oil?
Could you\we substitute 1 quart of your regular fill for this in a passenger car and achieve appreciable results?
Or should we leave well enough alone?
I think it might make an overall better oil mix than the oil you mixed it with. But it might make it worse in some areas, some of which you can get indications on and some that you cannot. This is one of those things that predictions of performance are essentially not possible, so you’ll have to try it and test to see how it goes. First ensure miscibility by mixing a small quantify of both oils, then letting it sit for a day, then look for separation. If it passes the miscibility test, it would be best to do a UOA on the oil you are going to mix the Valvoline with. That is, do a UOA in the normal oil run to x miles. Then run the mix for x miles and get a UOA on that. Get TBN and TAN tested in both UOAs. It would be extra helpful if you did a VOA on the mix.
I think it would be more ideal to just use purely the Valvoline oil. Getting a UOA on that would be helpful and interesting to us here. The Valvoline oil is already unchartered territory. Making a mix out of it adds the usual doubts/concerns to an already uncharted territory oil. If the UOA on the pure Valvoline looks good, then that can add confidence that all is well with that oil in your engine and your driving habits and climate. Then if you decide you want to try a mix, go for it and get a UOA on the mix.