Performance/Mileage Enhancement

[LDB]

My 19 was mostly empty, about 97% interstate, all flat except freeway overpasses and using cruise control to hold 60mph. I just delivered in FL. and ran about 63-65 the whole way and had about 86-88% interstate and a few hills. I got 17.9 so everything factors in. My spreadsheet figures my numbers at 16mpg so I figure I'll usually always at least make my numbers.

 

[JBCarroll]

My suggestion is to switch to synthedic oils, lubes, etc. Get a high proformance air filtration system. Have a turbo muffler installed. Other than that ( retrain your right foot ).

 

[guido4475]

That is what I am going to do-Put a larger high-performance exchaust on,free-flowing muffler,Change the fluids to sytnthetic,except the engine, for now.I dont want to jinx it not using any oil at all.Not even a seep.Tires are kept at 80 all around.And cruise control needs to be installed as well.I know that slowing down does improve mileage, but I cant drive 55, as Sammy Hagar sang about.There has to be a happy medium.Changing rear-end gears to drop rpm's at highway speeds to achieve better mileage?A freind and I are talking about that now, to determine the perfect gear ratio for both worlds.I have been averaging between 15.5 and 16.6 running at 70 loaded, empty.It could be better, I know.

 

[highway star]

Your mileage is low Guido, based on what i got with mine. At 70, I'd still be between 18 and 19. Most of the time I was at 20-21, the best ever being 23. I'd say the first thing is to look at the rear end.