You can use one this week and a different one next week, no problem. Some talk about the computer learning the new gas, etc. but I'm not sure I've noticed anything like that. The octane ratings are minimums anyways -- even at the same pump there is no guarantee from week to week that the levels are exactly the same.
Harry
MINI Cooper Cabrio: now the car with go cart handling really feels like an open go cart!
"... the only man that can come home at 3 am in the morning without getting into trouble with his spouse is the owner of a British sports car!" -- Phil Bailey |