Royal Purple and increased gas mileage?????

[zogg]

I bought a 2013 Ram 2500 Hemi and drove it 2000 miles before the first oil change. I had heard a lot of good things about Royal Purple, so I thought I would try the 5w20 as required by Chrysler.

Prior to the oil change, I was getting about 15-16 mpg average and got 19.1 hiway. I thought this was super for a 3/4 ton truck.

About 1200 miles after the oil change, I am running a pretty consistent 16+ mpg average, and have hit 21.2 mpg twice on the hiway...

I never used RP before, and never thought there would be any increase in mpg....I tried RP because it was supposed to be a premium synthetic, and I tow 8000 pounds occasionally.

 

[SwampSurvivor]

The engine is likely getting broken in.

 

[RamFan]

 

[WishIhadatruck]

Likely engine break in. Switch back to the OEM oil and see if it goes back down. Not likely.

 

[mclasser]

I concur with the engine break in. My new Honda Pilot's gas mileage improved as the engine opened up and stretched its legs more.

 

[Flareside302]

Are you freakig serious?!?!


It's getting broke in

 

[Donald]

Its other factors than the oil. Its good oil, but oil in almost all cases gives very small gains in mileage that are hard to measure for someone without test equipment and a test track.

 

[Merkava_4]

If the guy thinks he's getting better gas mileage with Royal Purple, let him believe it; why spoil it for him?

 

[Flareside302]

Originally Posted By: Merkava_4
If the guy thinks he's getting better gas mileage with Royal Purple, let him believe it; why spoil it for him?


Cause then he'll go spreading the myth that royal purple got him better mileage..

 

[05Blazer]

typical increase seen from not using the A/C and chicago summer blend gas is now gone. If there were increases that big from an oil, believe me every manufacturer would have their cars tested from the EPA with it and factory fill.

 

[TechnoLoGs]

The Royal Purple is not hurting the gas mileage here...

 

[901Memphis]

Ac usage probably hit the nail on the head.

 

[jhellwig]

If it up the fuel economy then it must have given him 10hp more also.

 

[HangFire]

No definitive answers here until the OP reports on the Butt Dyno results.