My friend has a 2002 Jaguar. It has spent most of its life in the shop under warranty. She said she knew it was bad when the loaner car guy noticed when she changed her hair style. The engine light has been on so much it has about burned out the bulb. Anyway, the latest saga is that her "throttle box" is "gunked up" (this is all according to the dealer). They claim that because she has been running 89 octane instead of 91 octane, this has caused it to gunk up. Now this sounds like the biggest load of BS I have heard. I don't see what octane could possibly have to do with it. As far as I know, the only stuff going through the throttle besides air is EGR gasses. Can anyone clear this up?

Mike

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1998 C230 330,000 miles (currently dead of second failed EIS, yours will fail too, turning you into the dealer's personal human cash machine)
1988 F150 144,000 miles (leaks all the colors of the rainbow)
Previous stars: 1981 Brava 210,000 miles, 1978 128 150,000 miles, 1977 B200 Van 175,000 miles, 1972 Vega (great, if rusty, car), 1972 Celica, 1986.5 Supra