I Review a Chevy 2500 HD with the 6.6L GAS L8T v8 engine as a Heavy Duty mechanic. I discuss the advantages of the new 6.6L gas engine from GM and then compare this engine to the F250 super duty 7.3L Godzilla engine when it comes to towing ability . Finally I give my conclusion as a mechanic whether or not the 6.6L L8T is a good towing engine.

F250 superduty 7.3L Towing review




What I Use:
Engine Oil https://amzn.to/3sVnAoX
Engine Oil Filter https://amzn.to/44Vk3nG
Engine Air Filter https://amzn.to/3JMmMVV
Cabin Air Filter https://amzn.to/3JMZAHh
Gear Oil https://amzn.to/3PoIcxa
Penetrating fluid https://amzn.to/3EOclkx
Rust protection https://amzn.to/3Zo0Rh6

Towing Gear:
10 ton Pintle hitch (2.5" receiver) https://amzn.to/3r7Axvm
7 Ton Adjustable hitch (2" receiver) https://amzn.to/46i2iAf
Adjustable Pintle hitch mount (2.5" receiver) https://amzn.to/3RqHGS3
15 Ton Pintle hitch https://amzn.to/45SaCqv
10,000lbs Tie Down Straps https://amzn.to/3ZBnxeh

My Camera Gear:
Go Pro Hero 10 https://amzn.to/3ObZdJJ
Go Pro Hero 8 https://amzn.to/36grzkM
Go Pro Accessories https://amzn.to/3JLhlXo
Sony A6400 https://amzn.to/3vkqzob


I like how simple GM kept this engine. it's really nothing fancy and is just a push rod v8. I like that GM has extended the stroke of this LT engine giving the 6.6L gas an easier time producing torque and producing it much sooner in the rpm band which is exactly what you want out of a work truck. this added stroke is great when we talk about towing and definitely helped this truck and engine when pulling my 14,000lbs trailer.

right off the bat this trucks comes with a 6 speed transmission and it showed it's weakness when towing and pulling hills on my towing course. it did not allow the truck to drop into higher RPM's to really keep those wheels turning and this resulted in the truck dropping speed.

the 7.3L engine in the F250's on the other hand with the 10 speed tranmission just seem to have a better ability to keep speeds going up hills at speed without loosing speed.

the 6.6L l8t gas engine has some good power in it and will serve many people just fine but when it comes purely to towing performance the engine just didn't match up to the 7.3L godzilla.

but in terms of reliable and longetivity this is where the 6.6L gas engine shines. a major advantage of this engine is that is does have active fuel management or dynamic fuel management (AFM/DFM) and this is going to make these engine pretty strong units.

GM when back to the drawing board and build a tried and true simple V8 engine that has been proven to be strong, powerful and take abuse. so this engine as work engine is a perfect unit.

people have alot complained about the poor fuel economy of this engine and I have to say when towing it was actually pretty efficient, which I was not expecting. the MPG's where much higher then the 7.3 from ford so it does seem to be more efficient when towing.

Anyways Guys I hoped you liked the video!

00:00 Intro
00:57 Trailer Set Up
01:28 Engine Specs
02:17 Max Towing specs
02:39 Max Payload/Truck Squat
03:55 Acceleration Test 3870MPH
04:59 Driveline Specs
06:04 First Hill Pull
07:04 Acceleration vs 7.3L Godzilla
07:40 Towing Fuel economy (mpg)
08:03 Transmission Temp when towing
09:40 Engine Braking
12:04 Engine Advantages and Strengths
14:44 Second Acceleration Test
15:25 Multiple Hill Pulls
20:17 Final Fuel Economy
20:58 Conclusion