Which Octane gas should I run?
 

Hey,
My new 2010 2500hd Crew cab with 6.0 and 4.10 rears came in. Here is my question. In my 06 2500 ext cab with the same engine, it was mandated in the owners manual that I run over 91 octane gas. The new one skips the 6.0, and says that if the truck has the 6.2 it needs 91 plus octane. What should I run in her? Dealer said to run either plus or high test gas. I sorta wanted a more straight answer then that.

I have always ran 91 octane in all of my trucks. It is supposed to have been refined more and better for the engine.

Why waste money on 91 if not needed?


Check out your owners manual, it will give you required fuel, it should be 87 octane, unless you have advanced your timing with a chip mod.


2010 Silverado 2500HD LongBed CrewCab Truck Overview



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5,967 cc 6.0 liters V 8 front engine with 101.6 mm bore, 92.0 mm stroke, 9.6 compression ratio, overhead valve, variable valve timing/camshaft and two valves per cylinder L96
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Unleaded fuel 87 and petrol
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Multi-point injection fuel system
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34.0 gallon main unleaded fuel tank 28.3
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Power: 268 kW , 360 HP SAE @ 5,400 rpm; 380 ft lb , 515 Nm @ 4,200 rpm

Enjoy the new truck

vp