Is it a turbo? Regular is false economy - Saab NG900 & OG9-3 Bulletin Board - Saabnet.com
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Is it a turbo? Regular is false economy
Posted by newwithasaab (more from newwithasaab) on Sun, 22 Jun 2008 07:25:03
In Reply to: Pinging, Don M [Profile/Gallery]
, Sat, 21 Jun 2008 18:22:56
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I assume if it's a '99, it is a turbo. Try running Premium. If you use lower grade gas, the car will knock. The ECU will detect knock and then retard the timing. You still get initial knock.
Chances are that the timing retardation is costing you power and therefor mileage. With regular around $4.10/gallon and premium $4.30, you only have to lose about 1 mpg for it to be a wash. Or to look at it another way: if you average 15K miles a year at 28mpg, you save a whopping $100 per year using regular with the power and MPG loss. Hardly worth it.
posted by 141.154.207...
Posts in this Thread:
- Pinging, Don M , Sat, 21 Jun 2008 18:22:56
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