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SUVs Jeep Cherokee and Jeep Grand Cherokee Jeep Grand Cherokee Real World MPG
102 messages, Last post on Jan 04, 2009 at 10:46 PM
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| speak up diesel cherokee peeps! real trucks don't have spark plugs. seriously now, how are your diesel grand cherokees doing on mpg especially once they get >10k miles.?? maybe there just aren't enough of you folks out there, or you are cranking out so many miles per year, you don't have time to post? | |
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First 1/2 tank I got 13.65. 5.7L Hemi, dealer told me that gas mileage would be about the same as my traded in 98 5.2L. Does anyone think that using 93 octane would increase mileage? I currently use 89. What about acetone to increase mileage? 4oz per tank?
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Replying to: kpsra (Oct 31, 2007 8:17 am) |
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Using the trip computer on my first tank of gas at 302 miles I am getting 15 mpg in 100 mi's of in town average. I got 21 mpg  60mph for 20 miles of rural highway last night. This is with fairly conservative driving, no AC, usually only 1 person in the Jeep. The sales rep said expect it to increase a little after 2000 miles, also to watch E85 ethanol usage in winter temps; I was tempted to do a E85 fill today with temps in the 50s but in MN that won't last. I will post more results in another 1-2 months after vehicle breakin but so far this is about what I expected with a small V8. |
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Hi - I run a '99 4.7L v8 GC here in the UK. Had it from new - bulletproof (my 3rd Jeep). 112, 000 miles on the clock. Had it converted to run on Liquid Petroleum Gas (LPG) at 35,000 miles. I get 23 mpg on petrol & 18 mpg on LPG - LPG is half petrol price in UK - so well worth using. Just had the lpg injection kit serviced & retuned & it seems to be performing better than ever - so mpg looks like it will increase with LPG. Any LPG supply in the USA? If so, is there a real price advantage. Most people who run on lpg here in uk say the running cost is 60% that of petrol - taking into account the lower price, but also lower mpg
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Replying to: nigbo (Nov 16, 2007 7:41 am) Do you get a lot of "pressure release" venting in your system. With temperatures around 115F here in the summer, I would imagine there would be some loss.
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Replying to: reholmes (Nov 16, 2007 8:16 am) 35°C (95 °F) installation concessions stopped here in uk for conversion to lpg, likewise muted that the exemption from the contentious London congestion charge (£8 / day) is to stop also for lpg vehicles. so much for the alleged 'green credentials' of the politicans (spit !) |
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Hi, just adding my data to the conversation. My mileage has gone up from new of 24.0 mixed (mostly highway commuting) to sometimes 26.5. I have one fill-up at 27.3, and am sitting on apparently another that will be 27mpg. It is truly improving, and you can feel the engine/transmission loosening up and continuing to settle in. Similar, but different than my ‘05 Passat TDI did (sold at 42k miles….). Looking now at my spreadsheet; the lowest I have is about 23.13 and just one other less than 24mpg; my overall average thus far is 25.08. (NOTE: I have checked the GC’s trip meter with a GPS unit just a week ago and it’s excellent: trip meter says 5.0 miles, GPS = 4.98 so very little diff). I have about 8200 miles total at this point. Again, my mileage is mostly commuting on I-5/local hwys at 55-75mph with some slow-n-go’s and a lot drafting (by necessity). Open highway will be slightly less. VERY IMPORTANT: be sure to closely check and understand the accuracy of your Trip Computer MPG reading. Mine reads 1.9 low (average, over 12 readings...). Thus, when it says around 24.0 (common for my driving..) I'm really at about 25.9. I love the vehicle, I'm glad I bought it. I I was able to get it for about $7700 off of the MSRP - thus putting it within 'striking' distance of the '08 Highlander and the new Saturn crossover price-wise. This is my 2nd diesel recently (had an '05 VW Passat TDI; 43 mpg same driving!). I intend to make all future purchases be diesel. |
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