- #2722 of 2773
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Re: Message centre says: Config A B [hulsebos]
by leadfoot4
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Aug 18, 2008 (11:49 am)
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Replying to: hulsebos (Aug 14, 2008 1:07 pm)
"hulsebos", off the top of my head, I believe it has to do with the trip odometer. You may want to select one of the trip functions, or refer again to the owner's manual, and see what they say about the trip function...
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- #2723 of 2773
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Re: "Restricted Performance" message in XKR [pathdoc]
by deadjag
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Aug 22, 2008 (9:19 am)
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Replying to: pathdoc (Jun 05, 2001 2:48 pm)
Although this is an older posting, I have exactly the same problem with my 1999 XJ8. Runs fine from a cold start but after 10-15 miles develops 'restricted performance' computer message, runs rough, and feels like maybe one cylinder isn't firing. After cooling overnight, the message is gone but occurs again after driving 10-15 miles. Does anyone know the out come of 'pathdoc's' problem??
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- #2724 of 2773
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Remote Battery
by jaguarxj8l
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Sep 15, 2008 (6:38 pm)
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How do i change the battery for the original remote for 2000 Jag XJ8-L, Please advise me.
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- #2725 of 2773
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Fuel Grade
by jaguarxj8l
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Sep 15, 2008 (6:44 pm)
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The dealer i bought the car said to use top grade gas, anybody know what will happen if i use the regular 87 grade?
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- #2726 of 2773
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Re: Fuel Grade [jaguarxj8l]
by gregg_vw
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Sep 16, 2008 (12:18 pm)
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Replying to: jaguarxj8l (Sep 15, 2008 6:44 pm)
Nothing bad per se will happen, except you will get a few less hp and slightly degraded gas mileage. Considering that the difference in cost between regular grade and premium is often no more than 20 cents, the savings are usually not worth it. Now, if you have the supercharged engine, I wouldn't use regular at all under any circumstances, but for naturally aspirated engines these days, the computer will take care of adjusting for a lower octane.
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- #2727 of 2773
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Premium Only
by hofiii
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Sep 17, 2008 (5:04 am)
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I believe that it says that Premium is"required" not recommended or at least mine does. I wouldn't use the regular gas. The engine is designed to specs that require premium. It's up to you.
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- #2728 of 2773
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Re: Remote Battery [jaguarxj8l]
by euphonium
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Sep 17, 2008 (11:56 am)
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Replying to: jaguarxj8l (Sep 15, 2008 6:38 pm)
Visit the nearest Radio Shack.
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- #2729 of 2773
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Re: Fuel Grade [jaguarxj8l]
by euphonium
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Sep 17, 2008 (11:58 am)
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Replying to: jaguarxj8l (Sep 15, 2008 6:44 pm)
If you don't like rattles in the trunk area, why would you provide rattles under the hood by using inferior fuel? 
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- #2730 of 2773
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Re: Fuel Grade [euphonium]
by gregg_vw
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Sep 17, 2008 (12:43 pm)
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Replying to: euphonium (Sep 17, 2008 11:58 am)
It won't "rattle" and it is not inferior fuel. Regular grade is lower octane and therefore takes less energy to ignite. On older cars which required higher octane, you would get knock (and possibly serious damage) with the pre-ignition of lower octane. Current engines adjust to the octane they are fed. Those that are set up to use premium obtain their hp and mpg ratings using it. Use a lower octane and you will likely have less hp and slightly less mpg. That is the main reason it makes little sense to use it. You see no savings, and you have less power (which protects the engine from pre-ignition).
Supercharged engines are an exception, as the electronics may not be able to adequately adjust to an octane change under more extreme conditions.
On the other hand, most cars that take regular fuel are not set up to gain hp from using premium. Using premium when your vehicle calls for regular may net you less mpg, rendering premium the "inferior" fuel in that case.
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- #2731 of 2773
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Re: Fuel Grade [gregg_vw]
by euphonium
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Sep 19, 2008 (3:00 pm)
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Replying to: gregg_vw (Sep 17, 2008 12:43 pm)
95 Thunderbird 4.6 V8 111000 miles
94 Lincoln Twn Car 4.6 141000 miles
Each runs better and quieter using Mid Grade or 89 Octane. My source for fuel does not inclue Ethenal either.
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