Real Life MPG 5.3 / 6.2

[RST Dana]

I didn't use a casio, I used the calculator built in my iPhone, but that calc was as follows:

487.4mi/23.4gal = 20.83 MPG, my ride said 20.7, I'll chalk up the difference in the small variance in how much fuel added, and to whatever degree the onboard is not accurate.

BTW, the ECM knows exactly how much fuel is injected into the engine (knows how much fuel per injection, and counts injections), and the odometer is probably pretty accurate, so my assessment is that the onboard computer is pretty close...validated by this calculation.

My boat's ECM calculate's fuel used, and is usually within 0.1gal of what I add, on a regular basis...
Net, I think this tech is pretty well hashed out by now.

Maybe, previous models all seem to inflate the reported mileage versus manual calculations. It’s all over the interweb as well as a few other post on TYF.
Casio was meant to make the younger crowd think. Most have never used one.

 

[WalleyeMikeIII]

Maybe, previous models all seem to inflate the reported mileage versus manual calculations. It’s all over the interweb as well as a few other post on TYF.
Casio was meant to make the younger crowd think. Most have never used one.

Had a casio, a Sharp, and an HP growing up...and can still use a slide rule...but that is dating myself!

 

[RST Dana]

Had a casio, a Sharp, and an HP growing up...and can still use a slide rule...but that is dating myself!

Zactly. Still have my slide rule too. Kids now look at it like it’s a rotary phone.

 

[SSGUNNER]

Yep, I try to focus on what my DIC tells me not what the nay sayers think.

I know how much money I pay on gas and aint much more than what I payed on my Daily driver Jeep…

 

[swathdiver]

I don't know if this makes sense, but feels like I get better mileage from top grade stations--exxon, mobile--than Sheetz and WaWa gas.

Definitely true is my experience. My best mpgs come from using Chevron, Mobil, Sunoco in that order.

 

[WalleyeMikeIII]

Definitely true is my experience. My best mpgs come from using Chevron, Mobil, Sunoco in that order.

I've been almost exclusively using Costco, its only about 7/8 of a mile from my office. Currently here it is $4.45 for 92 octane...that is what delivered that almost 21 mpg I reported. It is only about $0.20 higher than 87 at most of the other stations in town.

The other major provider here is KwikTrip, but their premium is non-oxy (which is AWESOME), but coms at a price (currently $4.999).

Haven't hit the BP, Shell, or Holiday yet, they are proud of their premium too.

 

[swathdiver]

I've been almost exclusively using Costco, its only about 7/8 of a mile from my office. Currently here it is $4.45 for 92 octane...that is what delivered that almost 21 mpg I reported. It is only about $0.20 higher than 87 at most of the other stations in town.

The other major provider here is KwikTrip, but their premium is non-oxy (which is AWESOME), but coms at a price (currently $4.999).

Haven't hit the BP, Shell, or Holiday yet, they are proud of their premium too.

One way of measuring value or efficiency is by cents per mile. If KwikTrip's fuel delivers 2 mile more per gallon it may make sense to use over the others that cost less and deliver lower mpgs.

 

[RST Dana]

FWIW,
Usually, big name company stores receive product from their terminals. However, tankers sometimes will pull from various terminals depending on supply/demand. Small, mom and pop stores maybe be getting Chevron,Sunoco, Exxon, etc without even knowing it.
I have delivered a few gallons of product for a few years for my father is how I know this. We pulled 99% Chevron, and only had less than 5% of the delivery locations tagged the same.
Another pet peeve, is price spread. $.””About 30 years ago, the difference between grades was no greater than $.05 when we loaded the 8900 gallon tanker. Once it hit the retail locations, boom! Anywhere from $.20 to $.40 spread.
At least I can say I pumped full service Gulf premium for $.32 in my life.

As you were…

 

[Stbentoak]

Another pet peeve, is price spread. $.””About 30 years ago, the difference between grades was no greater than $.05 when we loaded the 8900 gallon tanker. Once it hit the retail locations, boom! Anywhere from $.20 to $.40 spread.
At least I can say I pumped full service Gulf premium for $.32 in my life.

As you were…

Thats what P'd me off and I switched to mostly all diesel. Most vehicles we really liked were premium only, and paying.30 more I'm ok with.... but the spread is upwards of .80 currently in our area. When you calculate that over the lower mileage and life time you will own it, its very significant and a blatant money grab. I realize diesel doesn't look so exciting currently, but premium and diesel are only .20 apart and I'm going 40% further on it, so its still viable....

 

[xycrazy]

Many posts have indicated the only “real” way to check your mileage is using your Casio calculator and fuel receipt. The info screens only give you a warm fuzzy feeling, kinda similar to the feeling your salesperson gave you as you left the lot.

I'm actually getting better numbers when using the calculator than reading the dashboard... so... more than pleased with the consumption

 

[Micahsd]

Just curious…do most here leave the auto start/stop enabled or disabled?

I had disabled it each time I started it for the past year, but now that I had the lifter issue and only half were replaced I’ve been leaving the auto-stop enabled. One side effect of doing that is I am seeing better mileage in town due to leaving it enabled.

I tend to do mostly in-town driving, so while it’s not a huge jump it’s roughly about 1-1.5 MPH better compared to disabling auto-stop each time.

 

[WalleyeMikeIII]

Just curious…do most here leave the auto start/stop enabled or disabled?

I had disabled it each time I started it for the past year, but now that I had the lifter issue and only half were replaced I’ve been leaving the auto-stop enabled. One side effect of doing that is I am seeing better mileage in town due to leaving it enabled.

I tend to do mostly in-town driving, so while it’s not a huge jump it’s roughly about 1-1.5 MPH better compared to disabling auto-stop each time.

I've never disabled mine, and I do believe it does help the economy...although it is annoying at times.

 

[GMCnewbee]

I reported in another thread that we did a 500 mile highway trip last week. 16mpg with our 2022 Denali 6.2 while driving 75-80mph. All things considered, I am OK with that.

 

[SSGUNNER]

I've never disabled mine, and I do believe it does help the economy...although it is annoying at times.

Ever since the gas price hike I’ve been using it, why not since I have it.

 

[Yukon21Denali]

6.2L ‘21 Denali here, just did a trip to NYC about 375mi round trip. I fill 93 octane. I also have auto stop eliminator installed, got 18.6mpg while driving to NYC mostly highways at 80-85 mph. On way back got stuck in bumper to bumper traffic multiple times, it dropped mpg to 17.7. AC was running all thru the drive.

 

[R32driver]

We just took a 500 mile round trip over the cascade mountains here in soggy wetter than normal WA state. Wife and I with our 2 kids, 3rd row folded down and loaded with all kinds of camping gear, cooler, firepit, fold up table, yard games, etc with a huge heavy bike rack hanging off the rear with 5 bikes. Could definitely feel the extra weight we were hauling around. Speeds averaged anywhere from 55-80 and according to the dash readout I got 17.6 mpg on the way there with regular gas (that matches our 14K mile lifetime average that is dead on 17.6) and I filled up with premium on the way home just for kicks and got a whopping 17.9 so clearly no difference but wasted money

 

[xycrazy]

We just took a 500 mile round trip over the cascade mountains here in soggy wetter than normal WA state. Wife and I with our 2 kids, 3rd row folded down and loaded with all kinds of camping gear, cooler, firepit, fold up table, yard games, etc with a huge heavy bike rack hanging off the rear with 5 bikes. Could definitely feel the extra weight we were hauling around. Speeds averaged anywhere from 55-80 and according to the dash readout I got 17.6 mpg on the way there with regular gas (that matches our 14K mile lifetime average that is dead on 17.6) and I filled up with premium on the way home just for kicks and got a whopping 17.9 so clearly no difference but wasted money

What model / engine?

 

[BG1988]

2021 Tahoe 4WD with 5.3 and 8,200 miles.

Best MPG I’ve seen is 22.3 but the wind must’ve been pushing me that day.

I typically drive on town on short trips and average about 12 MPG. When I warm up the car on cold winter days when the temp is near zero that drops down to about 10 MPG.

that is about as good as metro driving you can get 13mpg on 5.3 of any model year for GM, except the hybrid models

 

[R32driver]

What model / engine?

‘21 xl with a 5.3

 

[H1Chester]

2022 Tahoe Z71 5.3L
Smooth Ride Suspension
Stock wheels and tires

I drive about 60 miles to and from work every day. I pass 13 traffic lights each way with the longest segment of the drive, about 60% with no traffic lights. My overall combined mileage on the dash hovers between 18.0 and 20.5mpg. I may have actually seen it read 21mpg. I believe I have it set to last 50 miles. On some days the trip planner or trip function will show 22mpg for the current drive. I put it on cruise and leave it at 55mph. I was cruising at 65 but our bud JB has forced me to drive slower to get the max fuel range out of it. 55mph is 10mph slower but only extends my drive a few more minutes longer, so why not?