Scenario: You have a fixed income coming in that could be used strictly for oil changes. Certain amount every 10k miles. Let's say $60. Vehicle takes 5 quarts per OCI. Would you spend that $60 on Redline (or Amsoil) for one 10k mile OCI or would you spend it on two 5k OCIs with Mobil 1? Or, if you could get store brand synthetic (Smitty's or Supertech) at the price of $12 per 5 quarts, would you rather change it five times at 2k OCIs? Let's say the oil changes are done for you free of charge and for all 10k there will be on one Fram Ultra filter. So given these circumstances which of the listed options would be the best for the engine?
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