It isn't that expensive, in conventional it is about 9 bucks a quart or 6 bucks a quart if you buy it in a 5 quart jug, but that is for the Valvoline high zinc stuff I use in the Harleys because IMHO they need the extra zinc, even with the roller lifters.Whats 20-50 cost these days lol
I spent to much time driving around looking for plan old 10-40
And non detergent oil.
The Synthetic Valvoline VR-1 20w-50 is like 12 bucks a quart in quart containers