I see that Costco has their own brand of synthetic motor oil. Like other Kirkland branded items, is it any good? Having a sale on 2 pack of 5qt containers for $25 delivered.
Look on your manufactuers website. Somewhere there is a list of approved oils. If Kirkland is on it you are golden. I just bought the oil to do my annuel on my ISM and the generator. I am running Shell Rotella T-6. Dealer said he could get it for $35.00 a gal. I said I would bring him some I had from Walmart at $22.47. Keep in mind the ISM takes 10 gal+ then add for generator, it totaled at $339.78. That is just oil, no filters. Bill