Driven DI40 Oil question
Burning Brakes
Joined: Jan 2019
Posts: 954
Likes: 376
From: Louisiana
I could ask you the same question. But the reality is there is plenty of information already available, not to mention OEM manufacturers recommendations based on extensive testing. There is a give and take when it comes to oil. No one oil does everything great. Run your 50 weight oil in your daily driver. It's not going to blow up. But you will have more wear over time vs using the correct spec'd oil for daily use. The reality is, even with mods, Mobil 1 0w40 sheers down to a mid 30 grade oil which protects just fine for moderate use such as drag racing and street driving. Remember, all Corvette's used to run 5w30 as recommended and the new 0w40 is only slightly thicker at temps but retains the cold start protection. Pretty sure it was designed that way on purpose.
https://drivenracingoil.com/n-2-why-...0your%20engine.
https://blog.amsoil.com/use-racing-o...-daily-driver/
https://www.racecar-engineering.com/...nce-motor-oil/
https://drivenracingoil.com/n-2-why-...0your%20engine.
https://blog.amsoil.com/use-racing-o...-daily-driver/
https://www.racecar-engineering.com/...nce-motor-oil/
The UOA's for 5w50 look fine. I showed a link to where they are all posted on bob is the oil guy.
Le Mans Master
Joined: Jun 2019
Posts: 5,429
Likes: 2,154
From: Loveland
Here,,,, some more info on the oil that you refuse to believe. It's a bit technical though.
https://www.tomorrowstechnician.com/...ent-oil-pumps/
https://www.tomorrowstechnician.com/...ent-oil-pumps/
Le Mans Master
Joined: Jun 2019
Posts: 5,429
Likes: 2,154
From: Loveland
Here is a good one. The main bearing clearance on our engines is .0020 to .0025. Driven recommends 10W-40 or 15W-40 for clearance of .0023 to.0028 up to 220* F OIL temp, hummmm! 
The C7 engine is on the low side of that clearance so even lower weight would be correct.
Have you ever looked at your oil temp? 99% + of the time you are below 220*F oil temp.
But then again, who believes the Driven oil company, they just makes the oil. DOH!
The C7 engine is on the low side of that clearance so even lower weight would be correct.
Have you ever looked at your oil temp? 99% + of the time you are below 220*F oil temp.
But then again, who believes the Driven oil company, they just makes the oil. DOH!
Last edited by kodpkd; Dec 19, 2024 at 01:02 PM.
Burning Brakes
Joined: Jan 2019
Posts: 954
Likes: 376
From: Louisiana
Here is a good one. The main bearing clearance on our engines is .0020 to .0025. Driven recommends 10W-40 or 15W-40 for clearance of .0023 to.0028 up to 220* F OIL temp, hummmm!
The C7 engine is on the low side of that clearance so even lower weight would be correct.
Have you ever looked at your oil temp? 99% + of the time you are below 220*F oil temp.
But then again, who believes the Driven oil company, they just makes the oil. DOH!
The C7 engine is on the low side of that clearance so even lower weight would be correct.
Have you ever looked at your oil temp? 99% + of the time you are below 220*F oil temp.
But then again, who believes the Driven oil company, they just makes the oil. DOH!
I think you are conflating viscosity with "racing oil." You can have a street oil that is at a higher grade and visa-versa.
Le Mans Master
Joined: Jun 2019
Posts: 5,429
Likes: 2,154
From: Loveland
If you are driving around town or even the highway and your oil temp is 240* there is something wrong with your car.
Probably because the oil is to thick.
.
Probably because the oil is to thick.
.
- "Heat transfer:
Thicker oil has a harder time flowing through the engine, which means it can't effectively carry heat away from moving parts, causing them to become hotter. " - "A car's standard oil filter does not typically go into bypass mode under high power; instead, the bypass valve within the oil filter only activates when the filter becomes significantly clogged or THE OIL IS TO THICK, causing a large pressure differential, regardless of engine power level".
Last edited by kodpkd; Dec 23, 2024 at 10:33 AM.
Burning Brakes
Joined: Jan 2019
Posts: 954
Likes: 376
From: Louisiana
If you are driving around town or even the highway and your oil temp is 240* there is something wrong with your car.
Probably because the oil is to thick.
.
Probably because the oil is to thick.
.
- "Heat transfer:
Thicker oil has a harder time flowing through the engine, which means it can't effectively carry heat away from moving parts, causing them to become hotter. " - "A car's standard oil filter does not typically go into bypass mode under high power; instead, the bypass valve within the oil filter only activates when the filter becomes significantly clogged or THE OIL IS TO THICK, causing a large pressure differential, regardless of engine power level".
At that temperature -50 is the preferred viscosity.
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