New 2023 5.7l hemi, 87 or 89 on first fill up?

[turkeybird56]

It will if they don't put the correct nozzle on the end of the hose, I have seen the wrong one a few times on a diesel pump, it happens when a nozzle goes bad an they only have one nozzle in the back room and it just happens to have a small nozzle so they put on what they have to keep the pump going...

YEAH, have seen that a few times. 06, I see where U R now allowed to pump your own fuel for your vehicle, think U up for it? LOL.

 

[rpr]

I guess I’ll be the odd man out on this one. Octane does make a difference…on my truck anyway. With 87 or 89 I get pinging when even just mildly accelerating on mild inclines. If I use 93 octane no pinging.

I hate that I have to do this, and I only recently found that 93 octane eliminates the issue even though the truck did it from Day 1.

There’s no tune or after market mods and the truck only has 60K on it so not sure what else could be causing it.

 

[David James]

Dealer delivered with a full tank, not sure what they used. Manual says 87-89, but 89 recommended for "
optimum performance and fuel economy".
I know this discussion has been floating around for years, any definitive conclusions reached over time on 87 vs 89 for this engine's performance, efficiency and most important to me: engine life?
Any harm to engine life with 87, if I didn't care about max performance and efficiency?
Also, maybe a dumb question, but any reason I couldn't fill the tank with half 87 and 89, call it a compromise between cost and performance?

Either one. I see zero difference in MPG or performance. I will typically fill with the higher octane at same time I change the oil “just because”, and on other occasions use E-15 88 octane rather than 87. Usually it’s a bit cheaper locally than the 87, but of course it has more alky in it. Again, no change in MPG or performance.

Keep it maintained and drive gently. I average 20+ mpg on road trips (most recent 21.5 VA-AZ round trip and local about 5400 miles), 114k trouble free miles, 2016 1500 4wD with 3.21 rear end

 

[Weebear]

50% of the time you're smart every time.

Yogi Berra? Is that you?

 

[boblonben]

Dealer delivered with a full tank, not sure what they used. Manual says 87-89, but 89 recommended for "
optimum performance and fuel economy".
I know this discussion has been floating around for years, any definitive conclusions reached over time on 87 vs 89 for this engine's performance, efficiency and most important to me: engine life?
Any harm to engine life with 87, if I didn't care about max performance and efficiency?
Also, maybe a dumb question, but any reason I couldn't fill the tank with half 87 and 89, call it a compromise between cost and performance?

Use only 87 is all three of my RAMs, all 5.7L. Have tried 89 to see if there was any real difference. Sure can not tell any and actually get be3tter gas mileage with 87 by about 1.2 mpg overall, including light towing.

 

[Jim S]

I put 89 in my 2021 one time. Damn thing drank it so fast, I thought it was dying of thirst. 10-11 mpg. Put 87 in since and continuously get 15-17 in town and almost 19 on highway at avg of 80 mph. Go figure. Tried using 104+ to boost 87 up, even worse than 89!

 

[Riccochet]

The reason 89 is recommended is for when you are actually using your truck as a truck. Heavy towing or hauling will put added stress on the engine, which can cause pinging, which will result in timing being pulled and reduced power.

Run 87 when just driving around. Run 89 when towing/hauling heavy.

 

[rosco11]

Dealer delivered with a full tank, not sure what they used. Manual says 87-89, but 89 recommended for "
optimum performance and fuel economy".
I know this discussion has been floating around for years, any definitive conclusions reached over time on 87 vs 89 for this engine's performance, efficiency and most important to me: engine life?
Any harm to engine life with 87, if I didn't care about max performance and efficiency?
Also, maybe a dumb question, but any reason I couldn't fill the tank with half 87 and 89, call it a compromise between cost and performance?

i have owned 2003, 2011, 2017 rams over the years. One had over 160k miles before i sold it, all had the 5.7. I ran regular unleaded in all of them. The computer will adjust the timing to make it work well. 87 oct. .................Now if you want that last little shred of power, in a 6000lb truck, run premium. A good 5hp extra, not that you will notice in any way, shape or form. But in your head it will mean something

First, if millage was a factor, why did you buy a 6000 lb truck? If the cost of fuel was a factor, why did you buy a 6000 lb truck? If you want to drive a 6000 lb truck that gets maybe 14mpg in the city on is best day, do not whine about the cost of fuel. Just put in whatever makes you feel all warm and fuzzy inside and be happy Dodge put 25 gallon tanks in theri trucks instead of 21 gallon like chevy does.

If the cost bothers you, stop driving 6000 lb trucks.

 

[KC Cryptkeeper]

When I run 89 I see a slight increase in gas mileage between 1-2 MPG.

 

[Alweeja]

87 always…..2% means Nada except $ waste.

 

[Alweeja]

i have owned 2003, 2011, 2017 rams over the years. One had over 160k miles before i sold it, all had the 5.7. I ran regular unleaded in all of them. The computer will adjust the timing to make it work well. 87 oct. .................Now if you want that last little shred of power, in a 6000lb truck, run premium. A good 5hp extra, not that you will notice in any way, shape or form. But in your head it will mean something

(Would be good to note that the Truck adjusts the timing itself) for the lower octane.

 

[Riccochet]

It only pulls timing when it senses knock. There's nothing in the engine, fuel system or exhaust that senses what octane fuel is being used.

 

[Zac1]

I use 88 ethanol free.

 

[06 Dodge]

YEAH, have seen that a few times. 06, I see where U R now allowed to pump your own fuel for your vehicle, think U up for it? LOL.

Well up to it, what few people know is that diesel owners have been able to pump there own fuel for many many years, fact back in 1985 I when I was driving long haul trucking I pumped diesel fuel into the semi I drove when in in Oregon, I was told the law only pertained to gas not diesel, and when I moved here in late 2018 I was never told or stopped from pumping my own diesel nor told that I could not do so, I admit I needed help using my credit card & cents off discounts at the pumps at my local Kroger/Fred Meyers station...

 

[Tulecreeper]

My manual states:"Fuel Selection - 87 Octane..."

 

[Shawn Burns]

I use 90 ethanol free. It's more expensive, but I live within 5 miles of work. Most of my longer trips, I am pulling a trailer. I've found that I get 1 MPG average using better fuel, while towing. Oh, and my truck is running a hemifever 89 tune.

 

[Dusty]

I used 89 on my 2010 and 2014 1500s for short periods, especially when towing. I wish I could say that conclusively I realized any difference at all, but I can't. My current 2019 has never had anything over 87 in its tank and runs fine with no issues. Nowadays it's hard to justify the 50 to 70 cents more a gallon for 89.

Regards,
Dusty
2019 Ram 1500 Billet Silver Laramie Quad Cab 2WD, 5.7 Hemi, 8HP75, 3.21 axle, 33-gallon fuel tank, factory dual exhaust, 18” wheels. Build Date: 3 June 2018. Now at 95790 miles.

 

[Riccochet]

My manual states:"Fuel Selection - 87 Octane..."

It's strange that your manual states 87, yet my 2020 manual states 89. Same engine, same everything. I'm not aware of any difference in parts. Though my manual says I can use 87, but might hear light pinging or knocking. My friend has a 2016 3500 6.4 and runs nothing but 87, even while towing his 5th wheel.

I'm going to run my tank down to dead empty and put in 1/2 a tank of 87 and see how it does.

 

[rpr]

Since I’m clearly in the minority on this, and I’m the only one reporting that I get pinging with anything less than 93 octane on inclines, does anyone have any ideas as to what the issue may be with my truck? It’s done this since Day 1.

Pinging is generally a timing thing, but there’s no way to manipulate that on these trucks (short of 3rd party tuners) and that would likely just be a bandaid that doesn’t address the root cause. I have no error codes. Has anyone ever heard of improperly gapped or defective plugs causing pinging? The plugs are original and I have 60K on the truck.

Just not sure where to start trying to figure this out.

 

[Tulecreeper]

It's strange that your manual states 87, yet my 2020 manual states 89. Same engine, same everything. I'm not aware of any difference in parts. Though my manual says I can use 87, but might hear light pinging or knocking. My friend has a 2016 3500 6.4 and runs nothing but 87, even while towing his 5th wheel.

I'm going to run my tank down to dead empty and put in 1/2 a tank of 87 and see how it does.

The only other thing mine says under Fuel Selection is not to use E-85.