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He's missing the single most important metric for motor oil, molecule shear.
It's not the rotating parts that wear out the oil due to friction like his first test, it's when the combustion chamber fires off and the piston is literally CRUSHING the oil molecules down at the connecting rod bearing. His test cannot accurately simulate those conditions.
When the oil molecules get squished hard enough that they explode that's called "oil shear", the balloon pops and the only thing protecting the bearing and crank journal from contacting is the ZDDP level of the oil.
In higher performance engines the higher ZDDP oil will win handily almost every single time. Those oils remain in good condition for a longer duration.
Cold flow test seems kind of odd, not really sure why that's in there.
Tribology is complex to say the least. Google/YouTube Lake Speed Jr (son of NASCAR racer). This guy is as knowledgeable as they come on the subject. Personally, I wouldn't risk experimenting on a "budget" motor oil in order to save a few bucks.
...experimenting on a "budget" motor oil in order to save a few bucks.
Supertech is made by Warren who makes oil for a LOT of other "brands". This oil also has GM Dexos Gen2 approval so it's not a budget oil by any means. It's low cost because it's sold by Walmart.
He's missing the single most important metric for motor oil, molecule shear.
It's not the rotating parts that wear out the oil due to friction like his first test, it's when the combustion chamber fires off and the piston is literally CRUSHING the oil molecules down at the connecting rod bearing. His test cannot accurately simulate those conditions.
When the oil molecules get squished hard enough that they explode that's called "oil shear", the balloon pops and the only thing protecting the bearing and crank journal from contacting is the ZDDP level of the oil.
In higher performance engines the higher ZDDP oil will win handily almost every single time. Those oils remain in good condition for a longer duration.
Cold flow test seems kind of odd, not really sure why that's in there.
Cleric ole boy!! It has been a couple of years since i have been on here. My 08 G was in a minor front end collision due to my son not paying attention. I had JUST taken full coverage off so it was gonna come out of pocket. I made him pay for it - & it took him a year to do it!! Then 6 months after i get it back he gets rear ended by a texting driver & the insurance company tried to force me to total the car. In my state the insurance companies can literally FORCE you to salvage title your car. No frame damage nothing but a new trunk lid, rear bumper and tail lights. I am still in court with the low life Liberty Mutual a$$hol3s. I have missed learning about my G from you!! As i have told you multiple times you have helped me more with my G35 than any other person by far. I have followed every bit of advice you have ever given me. My car now has north of 275K miles & still gets 26 - 28 MPG on the highway & burns less than 1/2 Qt of oil between 3750 mile changes. What is the oil with a high (or highest) level of ZDDP??
I like Valvoline VR-1 , you don't necessarily want the HIGHEST level of ZDDP for a car that is still equipped with a catalytic converter. The ZDDP (zinc + phosphate) does cause damage to the cats, the Valvoline VR-1 has almost the exact same ZDDP spec as the old ILSAC/API grade of oil that the VQ35DE was engineered for, ILSAC GF-3 or API-SL (same thing, one is a USA standard one is European standard).
Your 2008 equipped with the VQ35HR engine was designed to use ILSAC GF-4 or API-SM oil.
GF-3 oil had ZDDP levels around 1200 ppm.
GF-4 oil had ZDDP levels around 800 ppm.
Valvoline VR-1 has ZDDP level of 1300-1400 ppm
Modern GF-6 A/B oil has ZDDP levels around 350 ppm
I would recommend looking around at spec sheets on performance oil and find one that meets your GF-4 spec of 800 ppm.
This chart from Lucas Oil lays out exact zinc levels for their various oils, I think the synthetic 5W-30 part number 10049, or the synthetic 10W-30 part number 10050 for hotter environments would be ideal for the HR engine.
I think Nissan does recommend "ester oil" (synthetic oil) for the HR engine but I'm not sure, if you don't need/want synthetic then use conventional 5W-30 part number 10474, or conventional 10W-30 part number 10276.
