Chevy 1500 5.3L V8 FUEL ECONOMY vs 2.7L TurboMax | NOT What I Expected!!
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2024-07-28に共有
AFM/DFM Issues - • Chevy 1500 5.3L V8 Lifter FAILURES (A...
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Well I heard that this 5.3L V8 was efficient but I wasn't prepared for just how efficient it was going to be. I was also expecting the 2.7L turbomax engine to be much closer but the 5.3L blew everyone out of the water.
starting on the city section this V8 engine was surprisingly tame and was only behind the 2.7L Ecoboost engine which I did not see coming. but this V8 is not our typical push rod V8 there are a number of factors that help it save fuel.
firstly is the variable displacement oil pump which I personally don't like but when cruising at Low RPMs it works very well to help save fuel. additionally this engine is running 0w20 oil which is pretty light weight as should also help to have fuel.
the big fuel saving technology in these 5.3L V8 engines from GM is the active fuel management or AFM this is when 4 cylinder become deactivated hense the term cylinder deactivation.
now AFM ran from 2014 to 2018 but in 2019 GM introduced another cylinder deactivation technology called Dynamic fuel management or DFM. this is a more advanced cylinder deactivation technology which all cylinder can shut down at different times meaning the engine has up to 17 different firing patterns.
this according to GM can run 60% of the time while the truck is in normal driving conditions and saves 9% more fuel then AFM alone.
that is great for the city and country roads but on the highway this big displacement V8 can simply rely on the displacement for power and rather then having to downshift or shove boost into the engine like you would for a turbo charged smaller displacement engine.
Overall this 5.3L V8 overachieved my expectation!!
00:00 - Intro
00:36 - Engine Specs
01:42 - 5.3L Advantages
02:45 - Active Fuel Management (AFM)
03:25 - City MPGs
04:28 - Country MPGs
05:14 - Dynamic Fuel Management (DFM)
06:25 - Final Country MPGs
07:34 - Highway MPGs
09:03 - Final CALCULATED MPGs
コメント (21)
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I’ve been extremely happy with the 5.3 in my 2018 Silverado. I run a DFM muzzler and average 20.7 mpg in mixed driving. I can see 24+ on straight highway trips. Also, it has 173,000 miles now. Never had any lifter issues.
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I averaged in six months from purchase 20mpg over mixed driving. Back and forth from work 21 to 22 mpg. I am pretty impressed with this latest 5.3.
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Holy crap! It's incredible how efficient this V8 is. Great engineering on GM's part
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Great head to head comparisons. Next the standard out put ram 3.0 hurricane.
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That little bit of fuel saved is nothing compared to what it will cost to repair the engine when all those lifters and oil pump fail
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Very impressive! Thank you! Now if they can only resolve the lifter failures.
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I really enjoy your videos you put out . Thank you for your content and experience with diesel engines etc Roy
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TFL who? New subscriber. Love the channel so far.
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As far as DFM, focus on the positive Alex! The late Bob Ross said it best, GM doesn't make mistakes, just happy little accidents. 😂
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Even though I’m a Ford guy with a Coyote, I will applaud GM for this engine. 😊
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i put a level and 33’s on my 2023 5.3 and i went from getting 18-20 on stock to 10-12 with the tires.
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Hi Alex. What a tremendous surprise, and a very pleasant one at that. Unfortunately, all the savings they achieve through their AFM and/or DFM can go down the drain if the "lifters" fail and GM does not take the attitude of TOYOTA of assuming responsibility for failures from the design and engineering tests. That's right; very good performances in that 5.3 lts. Alex, I wish you could comment on the change of TOYOTA engines. THANK YOU very much and a HUG from CDMX; Mexico.
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The fuel management stuff they did for the 5.3 with GM hasn't done anything other then make the lifters fail earlier. I could see them going and doing this if it saved 9 percent line they said. But it hasn't. I do like some of the changes GM made to its engines and other than this and the start stop they would be good engines. The locking rings for their cylinders were an issue but that could have been fixed. I do think they would do better when giving the customers the options to have this technology if they wakt it with the cylinder deactivation and the stop start deactivation. I think they would last long if they have a switch to keep it on or off. They could also buikd a delete for these.
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I am with D the previous writer ! The little bit of mileage gain is far out Weighed by the issues the 5.3 is having. I have the 2012 with the 5.3 and have 95,000 miles on it with no issues( knock on wood). It sounds like a lot of people are not getting close to that before troubles arise on the gen 3 engine.
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I would be afraid of the cylinder deactivation in that truck it would ruin those lifters and cool that engine just keep the v8 a v8 don’t need all that extra crap
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I thought the same thing with the Ford being the most efficient engine out their for fuel.
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My 2021 5.3 (8-speed) does NOT have DFM and I get average of 19-20mpg on the highway and 16-17mpg in the city. Not terrible, not the best but I like knowing I don't have the increased risk of lifter failures.
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I got a GMc sierra 4x4 2023 v8 I get 25 on the high way and 17 city driving
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lazy v8 with tall gears gets the best highway mpg's. I don't know why people keep ignoring it. my 30 year old z28 can do over 30mpg on the highway
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well that is very nice! thx for your testing!
