moe in wichita ks
heres what happened to me. all of my driving was intown, i didnt like getting on the hiway. i have a stock 2001 dak club cab3.9 v6 auto trans 3.55 gear open, i run marvel mystery oil in the gasoline ALL the time. i was getting 11 to 12 mpg, i DO drive hard. i got a job on the other side of town 12 miles one way. last week i droveto work 5 times, i drove the hiway only to work, intown going home. 118 miles for the week. i filled up sun march 2. i got 14.4 mpg. i think i will drive the hiway going home now. i am trying a new thing for marvel mystery oil, i added some 2 cycle oil to it. i added one quart 2 cycle oil to to one gal mmo. and i put 4 oz mmo to 10 gal of gas. I LL let you know if it works. mopar or on car

 

you put 2 cycle oil in your gas??? hmmm...cant wait to hear the results on this one

 

It takes quite a bit of energy to get all of that mass up to speed (which you do a lot of in city and back roads) and quite a bit less energy to maintain a constant speed (highway). Highway driving is usually more economical even if you have to go a little further. Don't waste too much money on gas additives to increase fuel economy either, because they won't. You are not adding any real energy content to the gasoline and the injectors are still going to squirt the same amount of fuel per cycle.

Also, because with all of those oils in the gas, I would be concerned about ruining the catalytic converter and/or O2 sensors. Just don't put too much in.

(edited for clarity)

 

Adam is on the right track. You are going to be replacing that cat soon, not to mention you are going to have to be cleaning your intake manifold soon as well. Stay away from putting the oil in your gas. Bad idea for four stroke applications.

 

diesel guys put 2 stroke oil in their tank. but it is not good to put it in a gas engine.

 

I've got a 98 v6 2wd with 31 x 10.5's, manual trans and get about 11 mpg around town and 14-15 on pure hwy trips. The V6 just sucks gas big time. Lucas gas treatment has helped me in the past +2mpg on trips. Even if I baby the hell out of it in town 12 is the best I can do.

 

babing it 75% in town i am getting 17 mpg.

 

Is that with a V6 or V8? Stock tires or bigger?

 

stock 3.9L 3.55 Limitedslip auto. The only thing chaned is spark plugs, stock tire size. In the sdumer i get 19mpg in city.

 

moe in wichita ks
i should have said that iam putting mmo in the gasoilne to get better engine life. a friend of mine is a aircraft mechinic. he talked to a man that put mmo in a twin engine airplane. the faa said the engines had to be overhualed. when the engines were taken apart the mechainic told the owner that the engines did not need overhualed, but the regs required new parts to be put in. so i figured if this dude was willing to risk aircraft engines and it worked, i think it should safe. also i ran mmo in a 318 for 50000 miles and it started just as good at the end as it did when i started, from 50000 on the clock to 115000 miles.