Hello all, and thanks in advance for answers whether they be fact or opinion. I have come accross a couple of potential customers as side work that daily drive the air-cooled VW bug in So Calif. Both cars leak/consume a bit more oil than the normal. I had recently been to a couple of the OTR truck stores here in So Cal and noticed they sell bulk diesel 15w-40 weight oil for approx $10-11 per gallon vs the current price of $18 per gallon for the Delo/Rotella/Delvac oils. Would you encourage me to endorse this bulk oil for these applications, based on the viscosity/climate here, additive pack for flat tappet cams, and cost per qt to the customer?
Short of a VOA, do the bulk oils match the mfg's specs for additives or will the important additives sink to the bottom of the container?
Short of a VOA, do the bulk oils match the mfg's specs for additives or will the important additives sink to the bottom of the container?