Mazda3 Forums banner

Redline Oil Compromises HP Output and Fuel Mileage?

2.3K views 15 replies 7 participants last post by  blam  
#1 ·
The article at the link below and the graph inserted from this article suggest a strong relationship between the high temperture high shear viscosity (HTHS) and HP/Mileage. i.e. The lower the HTHS the better the mileage and more HP . I did a check of some of the more common aftermarket oils and also the Motorcraft 5w-20 to see how they compared. It would seem selecting an oil with a higher HTHS than the stock fill would cause a performance degradation. Would you agree? Here are the oils I checked out in ascending order of HTHS. Redline appears to be the worst possible choice. Using a 5w-30 Redline would cost you nearly 2% in HP and fuel milage. The viscosity index (VI) is also the poorest. However, it does have a high flash point (FP) which should translate to less loss of oil due to evaporation over extended oil changes. The Motorcraft as a synthetic blend would appear to be the poorest in FP.

Manufacturer Type & Grade, HTHS, VI, FP (C)

Pennzoil Platinum 5w-20, 2.6*, 160, 224
Mobil 1 0w-20, 2.61, 165, 232
Mobil 1 5w-20, 2.62, 163, 228
Motorcraft 5w-20, 2.65, 161, 185
Amsoil 5w-20, 2.7, 165, 226
Pennzoil Platinum 5w-30, 3.0, 167, 224
Mobil 1 5w-30, 3.09, 169, 230
Amsoil 5w-30, 3.2, 173, 234
Redline 5w-20, 3.3, 145, 251
Redline 5w-30, 3.8, 153, 252

*Pennzoil does not give the second digit accuracy, so order could change as the HTHS could have been as high as 2.64

http://www.iantaylor.org.uk/papers/IMechEFE2000.pdf

Image
 
#4 ·
[quote author=SiXX link=topic=49827.msg786576#msg786576 date=1151305156]
:woah:
[/quote]

I assume from your response that this is news to you, which is very surprising from reading your oil posts.
 
#6 ·
[quote author=Zarzthor link=topic=49827.msg797478#msg797478 date=1151792303]
[quote author=SiXX link=topic=49827.msg786576#msg786576 date=1151305156]
:woah:
[/quote]

I assume from your response that this is news to you, which is very surprising from reading your oil posts.
[/quote]

No... it was more like "wow... great statistic". Unfortunately I don't believe it, because those who have used Redline have said that it gives the best MPG out of any of the 20-weight synthetic oils. That, and I feel that RonAKA has waaaaaaay too much time on his hands, lol.
 
#7 ·
[quote author=SiXX link=topic=49827.msg798159#msg798159 date=1151822444]
No... it was more like "wow... great statistic".  Unfortunately I don't believe it, because those who have used Redline have said that it gives the best MPG out of any of the 20-weight synthetic oils.
[/quote]

You can get testimonials for anything, which is what makes them useless. Also be suspicious of any product which uses testimonials. It is usually the first indicator of a snake oil.
 
#9 ·
[quote author=SiXX link=topic=49827.msg798159#msg798159 date=1151822444]
That, and I feel that RonAKA has waaaaaaay too much time on his hands, lol.
[/quote]

Actually I don't, but when I get into a new subject of interest I find it worthwhile to dig as deep as necessary to understand it. My objective is to get down to basic theory and get a fundamental understanding of the technical issues. After that it is quite easy to put new information and comments into perspective. My only reason for looking at this one was to convince myself that there was value and safety in a Xw-20 oil. I'm now convinced there is, but the tradeoff to be concerned about is wear, and especially valve train wear. It should show up as tin and iron in an oil analysis, so I guess time will tell if there is a cost to the increased HP and fuel economy.

Finding out that Redline oil was a problem was just a co-benefit of this research. I wouldn't buy the stuff in any case due to the cost, but I now understand that it would also be a poor choice for technical reasons - unless of course one has issues with valve train wear. For that purpose it may have value, but at the cost of HP and overall fuel economy. Unless there is something amiss with the Redline specs, anyone who says they are getting more HP and better fuel mileage is blowing smoke.
 
#10 ·
[quote author=SiXX link=topic=49827.msg798428#msg798428 date=1151856573]
I'm not talking about "vendor testimonials"... I'm talking about real-world, real people, tracking their MPG.  Thanks for the lecture tho...
[/quote]

There is no such thing as a vendor testimonial. They are always "real world, real people", and they are always suspicious.
 
#11 ·
[quote author=Ron AKA link=topic=49827.msg825750#msg825750 date=1153006925]
[quote author=SiXX link=topic=49827.msg798428#msg798428 date=1151856573]
I'm not talking about "vendor testimonials"... I'm talking about real-world, real people, tracking their MPG. Thanks for the lecture tho...
[/quote]

There is no such thing as a vendor testimonial. They are always "real world, real people", and they are always suspicious.
[/quote]

Dude, I'm talking about MY real-world friends, relatives, etc. who have used Redline oil in the past. I'm not an idiot.
 
#12 ·
Everything's a compromise.  Higher viscosity = less power and mileage and better engine protection.  I doubt anyone would actually notice a difference either way though.  Worrying about these numbers is kind of obsessive (and yes, I used to do it too) since, in the end, they all pass the same tests. :)
 
#13 ·
[quote author=rpn453 link=topic=49827.msg826313#msg826313 date=1153045370]
Everything's a compromise.  Higher viscosity = less power and mileage and better engine protection.  I doubt anyone would actually notice a difference either way though.  Worrying about these numbers is kind of obsessive (and yes, I used to do it too) since, in the end, they all pass the same tests. :)
[/quote]

Perhaps obsessive, but why pay more $$ for a poorer oil? The Redline TX oil does seem to be slightly better than the other synthetics I've looked at. But this is not the case for engine oil.
 
#14 ·
[quote author=Ron AKA link=topic=49827.msg826377#msg826377 date=1153057487]
[quote author=rpn453 link=topic=49827.msg826313#msg826313 date=1153045370]
Everything's a compromise. Higher viscosity = less power and mileage and better engine protection. I doubt anyone would actually notice a difference either way though. Worrying about these numbers is kind of obsessive (and yes, I used to do it too) since, in the end, they all pass the same tests. :)
[/quote]

Perhaps obsessive, but why pay more $$ for a poorer oil? The Redline TX oil does seem to be slightly better than the other synthetics I've looked at. But this is not the case for engine oil.
[/quote]

Ok, now you just lost all creditability in my eyes. Check please :roll:
 
#15 ·
[quote author=SiXX link=topic=49827.msg826470#msg826470 date=1153064302]
[quote author=Ron AKA link=topic=49827.msg826377#msg826377 date=1153057487]
[quote author=rpn453 link=topic=49827.msg826313#msg826313 date=1153045370]
Everything's a compromise.  Higher viscosity = less power and mileage and better engine protection.  I doubt anyone would actually notice a difference either way though.  Worrying about these numbers is kind of obsessive (and yes, I used to do it too) since, in the end, they all pass the same tests. :)
[/quote]
Perhaps obsessive, but why pay more $$ for a poorer oil? The Redline TX oil does seem to be slightly better than the other synthetics I've looked at. But this is not the case for engine oil.
[/quote]
Ok, now you just lost all creditability in my eyes.  Check please :roll:
[/quote]

I appreciate you may consider it obsessive, but I suggest you actually read the article I posted, and then you will understand. If you want to actually understand issues rather than just rely on testimonials from the uninformed, it does take some time.