Procrastinating Quickie-Lube customers who ignore the sticker in the corner of their windshield, until the oil light comes on & the engine starts making this "ticking" sound........
0w30 versus 5w20
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Honda which champions petroleum 5w20 recommends a 10,000 mile oil change. According to Castrol this would result in over a 25% increase in viscosity which is double that of the Castrol 0w30. So over the long haul you tell me which oil gets the better fuel economy 0w30 synthetic or 5w20 petroleum?
I think he is referring to viscosity at 40C or some other "cold temp", not 100C. The %increase at 40C is usually much greater than at 100C. If that's what he means, those #'s are believable at a glance. The limits allowed by API tests for viscosity increase % at 40C (or whatever temp it is) is quite shocking actually.
I'm not saying I agree with all the conclusions though. I'm undecided due to lack of needed info.
I'm not saying I agree with all the conclusions though. I'm undecided due to lack of needed info.
Yes the API allows up to a 150% increase in viscosity in order to pass the API service SM grade.
You need to improve your critical reading skills.
In that article he compared the fully synthetic Castrol Formula SLX 0W30 to some mystery 5w20 dino(?) with a 2.9 HTHS. I bet if he used something like Amsoil 5W20 XL or M1 0w20 the results would of been quite different. In short, you comparing apples to cats and drawing erroneous conclusions.
I ran Exxon Superflo 5W20 out to just under 10K with LC in and got results good enough for Schaeffer's to say "continue with current drain interval".
I had some thinning, but not enough for it to be harmful.
Here's further evidence you're a troll.
That 150% increase at 40°C is the maximum. The better dino/dino syn blends show about a 100% increase, but that's after running through the Sequence IIIG test where a pushrod pig-iron flat tappet engine is run at 75% power for 100 hrs, with the oil kept heated to 150°C (302°F) for 100 hrs.
You'd have to drive up a 6% grade for 6600 miles in order to even begin to approach that type of service in your vehicle.
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So?
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Gary, you slay me!
Wait, I think I hear something playing in the background:
http://www.chivalry.com/cantaria/sounds/cherry.mp3
[ July 27, 2006, 07:23 AM: Message edited by: 427Z06 ]
Wait, I think I hear something playing in the background:
http://www.chivalry.com/cantaria/sounds/cherry.mp3
[ July 27, 2006, 07:23 AM: Message edited by: 427Z06 ]
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Wouldn't it be easier to modify your SIL's behavior then to have the industry advance about 5-10 years (with ancillary alterations to enable it) for her
Just tell her that she's ahead of her time and that she needs to wait for this market to develop naturally. Radicals do have their place in evolutions and revolutions. This should somewhat ease her chomping at the bit to bring this advanced conceptual lubrication theory to realization.
Now there have been a few who have used an Amsoil product that have gone 20k OCIs w/o issues. The oil typically thickened a grade or two. I guess it would be nice if the stuff just stayed where it was the entire time ..but it doesn't (apparently this is/has somewhat improved). I've yet to see many ill effects from the thickening ..but these users are obviously not taking years to put 20k on. They're high mileage types that spend a substantial amount of time in post warmup/startup state. This is where differences in viscosity are less apparent then they are during the warmup/startup phase of operations. That is, short trip users experience like viscosities during their transition that surely exceed the terminal visc that the extended drain user experiences. They don't appear to suffer much in terms of engine longevity because of it. So, this in itself is not much to be worried about. It's by no means ideal ..but it's workable.
The XOCI isn't for everyone.
Let me ask you one question. Do you assume that simply because an oil has thickened 100%-150% of its original viscosity ..that it has endured a Sequence IIIG service to attain that state
Just tell her that she's ahead of her time and that she needs to wait for this market to develop naturally. Radicals do have their place in evolutions and revolutions. This should somewhat ease her chomping at the bit to bring this advanced conceptual lubrication theory to realization.
Now there have been a few who have used an Amsoil product that have gone 20k OCIs w/o issues. The oil typically thickened a grade or two. I guess it would be nice if the stuff just stayed where it was the entire time ..but it doesn't (apparently this is/has somewhat improved). I've yet to see many ill effects from the thickening ..but these users are obviously not taking years to put 20k on. They're high mileage types that spend a substantial amount of time in post warmup/startup state. This is where differences in viscosity are less apparent then they are during the warmup/startup phase of operations. That is, short trip users experience like viscosities during their transition that surely exceed the terminal visc that the extended drain user experiences. They don't appear to suffer much in terms of engine longevity because of it. So, this in itself is not much to be worried about. It's by no means ideal ..but it's workable.
The XOCI isn't for everyone.
Let me ask you one question. Do you assume that simply because an oil has thickened 100%-150% of its original viscosity ..that it has endured a Sequence IIIG service to attain that state
Don't let ekpolk hear you say that.
Tell your sister-in-law to read and follow the owner's manual. If the manufacturer allow 20K OCIs, they surely have recommendations for the type of oil that is required.
What manufacturer are we talking about here? I'm guessing something like a BWM or Mercedes. But I didn't think those manufacturers spec'd an OCI beyond 15,000 miles...but maybe I'm wrong.
My sister in law ownde a 1999 Ford Contour and a 2003 Toyota Celica and went up to 20,000 miles without an oil change while under new car warranty.
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I'll bet disinterest. She probably has one mandated safety inspection per year and wants all services to be provided at that time. She also must do 20k per year ..or she's somewhat unwisely giving up the opportunity to have the oil changed earlier.
My sister in law changes her oil every 20,000 miles and she needs an oil that stays in grade for that period or her new car warranty will be voided. The API service SM grade with its 100% to 150% viscosity increase simply does not cut it for the 20,000 mile extended drain and the API needs to develop a more rigorous grade for the people that don't like to change their oil. Synthetic oil producers have proposed a triple sequence IIIG test to validate the performance of extendeddrain oils.
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