Changed to Synthetics, and Inflated Tires gave 2mpg more.

[Skibug]

I just thought I would share my good story about better gas milage. I recently changed all the fluids (Differentials, engine), and flushed and changed the coolant. I put synthetics back in the engine and Differentials. Before I was getting about 15mpg max with 100,000 miles on the truck. Now after I changed the oils to synthetic and inflated my tires to 40 psi, I am getting at least 17mpg with normal driving. The ride is a bit stiff with the tires inflated to 40psi, but is ok.

I was really surprised when I hit 280 miles, in all city driving, the other day on 16 gallons.

 

[IAmTodd]

Have you taken the tire wear into account also? Centers are going to wear out extremely quickly being inflated that high.

 

[aldive]

Have you taken the tire wear into account also? Centers are going to wear out extremely quickly being inflated that high.

I run 40 psig in mine all the time and never have had a wear problem.

 

[IAmTodd]

I ran 35psi in my ATs and it wore the center out way before the outside. Must have just been the tire.

 

[Skibug]

That's fine now. I bought the truck in June 2004 and the guy had just put brand new tires on it. The thing is though, they were some cheap tires and I wanted to replace them. But I can't convince myself to replace tires with this much tread on them right now.

The tires have a vibration at highway speeds and I have taken them in multiple times to be balanced. When I first got the truck I took it in to get them balanced and the guy told me that they were out of round and that he could only balance them so much to off-set the out of round tires. So I am just waiting for them to wear to a point so that I can convince myself to replace them.

I think the guy that sold it to me just put the cheapest tires he could find on there before he sold it. I am a firm advocate that you get what you pay for when it comes to tires.

 

[Billy177]

before i got my 31's my michlins were all inflated to 40psi, only problem i had was the front tire wear cause i had not had my camber fixed from my TT