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5.3L vs 6.2L V8


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for what it is worth my best 25 mpg is 23.8, best 50 is 21 and my best 400 is 16.7.  I have 3500 miles on the truck.  The best 25 and 50 were both on a recent trip that was mostly country roads with speed limit of 55.  Mix of flat and hills.  Pretty good IMO with the trailboss (2in lift, duratracs and no front chin spoiler).

 

I haven't gotten enough miles to get a good 400 mile trip that didn't have a lot of idling and stop and go.  We went from winter to 90 degrees last week and with C19 I haven't been going anywhere for the previous 10 weeks (work commute is 2 miles).

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14 hours ago, Mikedfw said:

You didnt word it wrong, that's one of the many reasons this thread is so crazy.

That's not the only reason. Some people are trolls, some people respond too much to trolls, and others are just dedicated to this subject. Also, did you mean to say didn't or did?

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There is a great deal more to a motor being Better than the most powerful.

 

GM's very own Gen1 'Mouse' motor for example. 100,000,000 made. Let that number sink in a minute. ONE HUNDRED MILLION!

 

In race trim exceeding 2,000 hp. Well though out tune will net upper mid 20's mpg numbers. Anyone can work on one and you can still buy them new. It will be a while before the Ecotec3 reaches that feat. Many thought the LS would....yea....not

 

The GM 3800 series 3 is a Better Motor than the 6.2 almost equal in accomplishments to the Mouse and more durable. Perhaps GM's finest work...

 

The Gen 1 400 CID was never as good as the 350. Lack of a full water jacket hurt the cooling layout. The 327 would outlast a 350 generally and was more flexible. 

 

Being large and powerful is not a bad thing, it just isn't the only thing.

 

Well unless "most powerful' is  your only criteria. If so buy a Ford 3.5 V6...   450 HP over 500 lb/ft.

 

What do you know about these two motors you haven't read? All you know is they are 'different' in power and 'alike' in construction... sort of.  Ask this question 40 years from now. After you decide what BETTER means. 

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That's not the only reason. Some people are trolls, some people respond too much to trolls, and others are just dedicated to this subject. Also, did you mean to say didn't or did?
Didnt. I was saying that your post was worded fine, it really isn't confusing at all, but people are making it that way for no apparent reason.

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There is a great deal more to a motor being Better than the most powerful.
 
GM's very own Gen1 'Mouse' motor for example. 100,000,000 made. Let that number sink in a minute. ONE HUNDRED MILLION!
 
In race trim exceeding 2,000 hp. Well though out tune will net upper mid 20's mpg numbers. Anyone can work on one and you can still buy them new. It will be a while before the Ecotec3 reaches that feat. Many thought the LS would....yea....not
 
The GM 3800 series 3 is a Better Motor than the 6.2 almost equal in accomplishments to the Mouse and more durable. Perhaps GM's finest work...
 
The Gen 1 400 CID was never as good as the 350. Lack of a full water jacket hurt the cooling layout. The 327 would outlast a 350 generally and was more flexible. 
 
Being large and powerful is not a bad thing, it just isn't the only thing.
 
Well unless "most powerful' is  your only criteria. If so buy a Ford 3.5 V6...   450 HP over 500 lb/ft.
 
What do you know about these two motors you haven't read? All you know is they are 'different' in power and 'alike' in construction... sort of.  Ask this question 40 years from now. After you decide what BETTER means. 
Ok, so this post was asking to compare a 5.3 liter v8 made by gm to a 6.2 liter v8 made by gm.

All these other engines are irrelevant, I'm not saying that there are no engines better than the 6.2 and I dont know where you got the idea that is what was being discussed.

Again, comparing these two specific engines, power is the primary difference.

6.2 has more power, better acceleration, better passing power, better at higher altitudes (due to having more available power), basically the same towing and mileage, reliability about the same. How is it not the better engine? What differences are there between these two specific engines that makes you think the 5.3 is better than the 6.2 or at least, what makes you think that being better in this specific scenario is about anything other than power?

Again, if we are talking value or comparing to a diesel engine, then you would have a point, there are other factors involved then, but these are two engines made by the same company for the same purposes, one just does everything the other can do, but with less engine strain, or faster.

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I think the ls7 is the best...

 

 

For those of you that think premium isn't required. I experience audible pinging all the time at part throttle running empty going up hills. I've only ever used shell 91, I'm now trying esso 91; but it did the same thing today. Only option left is 94 octane from different stations. But neither company is top tier and aren't considered to provide quality fuels.

 

I'm also 3000 feet above sea level. Wot no audible knock, just part throttle with slight load. Scares the ****** out of me, because it does not stop unless it downshifts. And honestly, I think the majority of people on hear have no idea what spark knock sounds like and it happens to them all the time.

 

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1 hour ago, M1ck3y said:

I think the ls7 is the best...

 

 

For those of you that think premium isn't required. I experience audible pinging all the time at part throttle running empty going up hills. I've only ever used shell 91, I'm now trying esso 91; but it did the same thing today. Only option left is 94 octane from different stations. But neither company is top tier and aren't considered to provide quality fuels.

 

I'm also 3000 feet above sea level. Wot no audible knock, just part throttle with slight load. Scares the ****** out of me, because it does not stop unless it downshifts. And honestly, I think the majority of people on hear have no idea what spark knock sounds like and it happens to them all the time.

 

If you're knocking on 91 octane, you've got other issues going on. Bring it in. I experience 0 knock with 87

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2 hours ago, Mikedfw said:



Again, comparing these two specific engines, power is the primary difference.

 

Your really have not idea what that word means, do you?

 

BETTER  

 

This isn't philosophy; this is English.  Better: Etymology Old English bettra, earlier betera "of superior quality or excellence," from Proto-Germanic *batizo

 

It has nothing to do with POWER. It has to do with excellence and quality. Does that need to be defined as well? 

 

I didn't ask the question, the OP did. His word, not mine. Difference in and of itself does not make a thing better.

 

How does the 6.2 EXCEL in QUALITY compared to the 5.3?

 

It doesn't

 

 

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7 hours ago, Jonofmac said:

If you're knocking on 91 octane, you've got other issues going on. Bring it in. I experience 0 knock with 87

 
 

Nope, nothing else going on. Your not gm. There's a reason they highly recommend 93 octane. I'm happy that your think your a know it all, but you can't account for all variables, regions, and climates. It even states in the manual if you have audible knocking below 93 octane, fill up with 93 as soon as possible. If you have audible knocking on 93, then you have a problem. People can decide for themselves but I will trust gm over a random forum user. 

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10 hours ago, Grumpy Bear said:

Your really have not idea what that word means, do you?

 

BETTER  

 

This isn't philosophy; this is English.  Better: Etymology Old English bettra, earlier betera "of superior quality or excellence," from Proto-Germanic *batizo

 

It has nothing to do with POWER. It has to do with excellence and quality. Does that need to be defined as well? 

 

I didn't ask the question, the OP did. His word, not mine. Difference in and of itself does not make a thing better.

 

How does the 6.2 EXCEL in QUALITY compared to the 5.3?

 

It doesn't

 

 

 

You've jumped the rails ages ago. "better" when used in the original question, just refers to "better choice".

 

https://www.thesaurus.com/browse/better

 

Either you're just bored and having fun trolling everyone, or you simply are incapable of admitting you messed up and just want to save face by banging out one useless post after another.

 

It's exhausting reading your posts.

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Your really have not idea what that word means, do you?

 

BETTER  

 

This isn't philosophy; this is English.  Better: Etymology Old English bettra, earlier betera "of superior quality or excellence," from Proto-Germanic *batizo
 
It has nothing to do with POWER. It has to do with excellence and quality. Does that need to be defined as well? 
 
I didn't ask the question, the OP did. His word, not mine. Difference in and of itself does not make a thing better.
 

How does the 6.2 EXCEL in QUALITY compared to the 5.3?

 

It doesn't

 

 

You are really grasping at straws. If you want me to go by your definition I would say the 6.2 is "of superior excellence" for all the reasons listed previously.

You know what people mean when they say "better". You know what the OP meant. If you want me to start using synonyms here so you can feel like you're right, fine. The 6.2 is superior; of superior excellence.

I'm honestly not sure if you are really this dense or just being difficult or maybe you're just trolling and I'm taking the bait.

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been using a mix of 87 and 91 in every other tank when i fill up 

 

I used it on my 2014 Sierra 6.2 and then my 2016 6.2 and now my 2019 6.2 

 

Zero knock , zero issues . Everyone has their own experience but mine has been 87 works just fine. 

 

Now if i was hot lapping my truck going WOT back to back to back , then maybe 91 would be proffered ( 91 is highest here) 

 

But this is after all a truck . I get on it from time to time and hear zero knock .  What i do hear is a beast of an engine 

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10 hours ago, Grumpy Bear said:

Your really have not idea what that word means, do you?

 

BETTER  

 

This isn't philosophy; this is English.  Better: Etymology Old English bettra, earlier betera "of superior quality or excellence," from Proto-Germanic *batizo

 

It has nothing to do with POWER. It has to do with excellence and quality. Does that need to be defined as well? 

 

I didn't ask the question, the OP did. His word, not mine. Difference in and of itself does not make a thing better.

 

How does the 6.2 EXCEL in QUALITY compared to the 5.3?

 

It doesn't

 

 

Might be time to get more sleep :)  

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11 hours ago, Grumpy Bear said:

Your really have not idea what that word means, do you?

 

BETTER  

 

This isn't philosophy; this is English.  Better: Etymology Old English bettra, earlier betera "of superior quality or excellence," from Proto-Germanic *batizo

 

It has nothing to do with POWER. It has to do with excellence and quality. Does that need to be defined as well? 

 

I didn't ask the question, the OP did. His word, not mine. Difference in and of itself does not make a thing better.

 

How does the 6.2 EXCEL in QUALITY compared to the 5.3?

 

It doesn't

 

 

You've said the same thing with different fonts at least 5 times now. Please give it a rest.

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