Is Walmart Mobil 1 Turbo Diesel same as ESP 5W40?
I installed OPS system with Mobil Delvac 1 ESP 5W40, which is about $39 per gallon at truck stops.
I have found it at Pepboys for $28/gal.
Also see at Walmart Mobil 1 Turbo Diesel Truck 5W-40 at $27/gal.
Is this same/similar to ESP?
Any other sources for most economical oil?
Is this a good question?