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The other (which I just got, I was told by their customer service rep reports every 30-60 days with no specific date):
Both the Exxon and the Chase cards are exact (3% rebates on gas, 1% rebates on purchases, and rebates are in cash dollars and are automatically applied to your balance on the statement closing date). Both are excellent cards. The only difference is that the 3% rebate for gas is ONLY at the Exxon or Mobil stations using the Exxon card. The Chase is ANY gas station. Well I got the Exxon because I buy their gas (or Mobil) as it's the cheapest here in Los Angeles, compared to say "Shell", 76, etc...
The Wells Fargo was offered to me by my bank (checking) and have the highest CL with them ($10k). Exxon (started at $2.5k), Chase (lowest - $400)