2008 V6 Highway Mileage

[trf97]

Well...here is a little update. Still to early to know if I am back to normal but I did reclean the MAF sensor. The first time I did not clean the little wires down inside the sensor, only the amber bulb. I have run seafoam through the tank and intake not too long ago. This time I disconnected the battery too.

I have also been reading on a LS1 forum where a lot of guys have been putting TCW3 2 cycle oil in their gas at a mixture of 500:1 or 1 oz per 4-5 gallons. This is supposed to lubricate and clean the upper cylinder walls.

I will report back results after 4-5 tank of gas.

 

[manp0899]

What are the instructions for using sea foam?

 

[CookieRoe]

I have yet to see any conclusive evidence of using sea-foam on an engine that is running fine (relatively speaking), that boosts power/economy/etc.

If doing plugs/filter/oil/+tire pressure/etc doesn't work look at the gas you use. Someone mentioned bad gasoline. I'd start here. I used to fill on a Giant/Sam'sClub/Sheetz gas before I starting using Top Tier gasoline. Yeah, I know, gas is gas, but really it isn't. I saw my MPGs go up slightly.

 

[Nuke]

How many data points with the lower fuel mileage are we talking? 2? 20? 50?

There are so many things affecting fuel mileage both vehicle-related and non-vehicle-related that the data can easily get skewed. I've had long term fuel mileage data for 400 mile one-way trips getting gas from the same gas stations, driving with the cruise on the same speed and have seen variations of 4 MPG for the identical legs of the trip. Too often we assume it's our vehicle when it's actually the % ethanol in the fuel, wind direction, temperature, humidity, weight increase or reduction in the vehicle, yada yada. A few additional red lights alone can impact average mileage calcs from fill-up to fill-up.