I never relied much on a rebate, in fact prior to joining BITOG didn't bother much with them. Now I take advantage of rebates whenever possible, but don't buy a product just because of a rebate. I treat the rebate like a bonus, if I get it, I get it. As far as Mobil 1 customer service, they were very rude, either on the phone or via email. More so than any of the other oil companies I corresponded with.