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E3 Spark plugs in 4.0
 
 
austinjoe13 austinjoe13 is offline
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06-25-2011, 12:13 AM
 
Does anyone here have any experience with E3's in a 4.0? I want to do a tune-up on my 89 XJ and am curious about them. Any improvements in MPGs?
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06-27-2011, 05:29 PM
 
from what i've read on other forums... the E3 quality is poor and prone to failure or breakage when installing.


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rstarch345 rstarch345 is offline
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07-11-2011, 09:00 AM
 
I've had the E3 in my '00 XJ for 1 1/2 years now and no problems. I have the Bosch Platnium +4 in my '98 for two years.

Horsepower TV and Trucks have run dynos on both spark plug brands and have rated the E3 high on their performance rating.

No spark plug is going to give you magical MPG improvements. What they do do is to improve combustion burn resulting in gains in HP and torque. When you improve both of these with no other changes, MPG improvements can be had, but minimally. Gains would be over a period of time.
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austinjoe13 austinjoe13 is offline
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07-11-2011, 02:05 PM
 
Spark plugs and engines must be like guns and ammo then, some loads work for some and don't for others. I ended up getting champion platinums
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1990 XJ Laredo stock and fully loaded
'89 XJ Laredo lifted 2.5" on 31x10.50s
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rstarch345 rstarch345 is offline
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07-11-2011, 02:14 PM
 
Quote:
Originally Posted by austinjoe13 View Post
Spark plugs and engines must be like guns and ammo then, some loads work for some and don't for others. I ended up getting champion platinums
I'd say that's 100% correct.
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