Better milage w/o the Gas cap?????

[mgreen84]

Better mileage w/o the Gas cap?????

Ok with everyone having to pull money out of hats to buy gas, I though I would share this.
The wife and I left this morning to have some fun in the Florida 'Glades, we live in north georgia, while filling up I was in a hurry and mistakenly left my gas cap hanging in the door, I reset my tripmeter to clock my mileage and it was great... 17mpg, once I stopped again and realized the cap wasn't on I thought it would only get better if I put it on,so I did.....now..... using the same grade of gas FROM THE SAME FRIGGIN' COMPANY, I got 14 miles with the cap on. Most fuel injection systems have to pull a vacumn, what happened here? No engine (idiot) light, but the milage was alot better.

 

[90xj4x4]

sounds like a fluke thing to me.

 

[jackieonasses]

You have to consider, Grade of Highway (steepness), Speed, Wind, Temperature, and Gas quality.

I would think the difference would be marginal. But any gain would be lost if gas spilled out...


kyle

 

[mgreen84]

yeah I thought of that, but like I said I live in north ga, if anything the mileage should have gotten better with the conditions, smoother roads, no mountains, and believe it or not it actually got cooler in south ga, just a weird thing I guess, me myself, thinking about buying a go cart with seatbelts to save on some gas.