Although I do not agree with the Bosch statement I do think that the driveability increase and the piece of mind gained through replacing 130,000 mile plus componets alone is worth the coin.

Lamm

 

so do i get the old axle grease? woooohoooo!! lol

So when you correct for your odometer you are getting about 14mpg?

Mine got that prior to the HG gasket pretending it was a grenade...lol

 

Corrected is:

Before:12.50
After:14.02

I just have a hog of a 3.0 it seems.

Lamm

 

mine gets that around town or used to. on highway it'd jump to 20 to 21 if i kept my foot out of it and did 65mph.

When I went from my michelins 235/75r15s to BFG ko 235/75r15s I lost about 1.5 mpg, so im going back to the michelins since i dont wheel enough to justify the KO's... Now if I could find them (X radial LT) in the stock 225/75r15 and a Load Range C, I could probably get my old 22-23mpg highway back....lol

tire size and type VS gearing is HUGE with my truck anyhoo...lol

 

Yeah, I used to get 14+ with little street tires, city driving.

I will be switching to 33x10.50 MT and 5.29:1 gears in a year or so.

I also have logged highway MPG 15.8 before my fueal saver mods so I would estimate I could push 18 now, pretty good.

Lamm

 

Congrats to nunsa. thanks for the fun contest Lamm. Now i'm going to have to baseline my truck again and see what kind of mileage I'm getting before and after I do my fall tune up. I'll post the results. Aviator

 

Two-Sample T-Test and CI: MPG, Period

Two-sample T for MPG

Period N Mean StDev SE Mean
After 3 13.233 0.231 0.13
Before 3 11.800 0.173 0.10

Difference = mu (After) - mu (Before)
Estimate for difference: 1.43333
95% CI for difference: (0.90293, 1.96374)
T-Test of difference = 0 (vs not =): T-Value = 8.60 P-Value = 0.003 DF = 3

So, we CAN say the difference is statistically significant at a 99.7% confidence level - very good!

 

was that a one- or two-tailed analysis?

 

This is why I never got into statistical analysis... tc could you please explain your formula for the rest of us? Thanks Aviator

by the way not flying tomorrow so I had 2 manhattens and half a bottle of wine with dinner. So my brain is running on E85 and the HP just ain't there haha

 

T-test is two tailed (well, actually, you can set the program to do it either way, but generally two-tailed is the appropriate way)


Just a summary of the two groups

The difference between the means is 1.4333, and we have a 95% confidence level that the mean is somewhere between 0.90 and 1.96

T-testing is a hypothesis test. In this case, the null hypothesis is that they are equal (difference=0) You can't ever really "accept" the null hypothesis, you "fail to reject it". If the P-Value is low, however, you can reject the null hypothesis, and say the two distributions are different.
1-PValue is essentially your confidence level on how sure you are the populations are different.

 

so weird...i'm up in flagstaff, az now for school. took my girlfriend down to pheonix for a flight and got 19 mpgs on the way down! ok it is mostly downhill but that still doesn't make sense. i went down at around 75 all the way, little uphill w/ the o/d off. i still don't believe it. maybe the pump in phx was off? lol well w/e i'll take watever i can get w/ my 3.slow auto

 

Weird, i've got bigger, heavier tires than you and get much better mileage.
Your 3.0 doesnt like you.

 

I once got 22 mpg doing a steady 80 (55 mph) on a flat secondary road going for a few hours. It's true about keeping yer foot outta it. And that was without my tonneau that I have on now.