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re: OB mechanic opinions.
Posted on 4/17/18 at 8:42 am to rented mule
Posted on 4/17/18 at 8:42 am to rented mule
I was skeptical about Mobil 1’s 15k mile claim for their extended performance oil until I saw this lab sheet from a fellow OB’er:
A Sierra with a 5.3 and over 100k miles on 12k mile intervals... and the lab says it can do 14k.
Personally I follow what my oil life meter says in my 2010 Yukon Denali. It typically starts yelling at me around 10k miles and that’s where I’m comfortable. My fiancee’s 2016 Jeep usually says to change the oil around 8k. I figure if the engineers put the oil life meter in the car that I should follow it. Plus the lab sheet proof was a big one for me - if they were impressed with the oil I am as well.
A Sierra with a 5.3 and over 100k miles on 12k mile intervals... and the lab says it can do 14k.
Personally I follow what my oil life meter says in my 2010 Yukon Denali. It typically starts yelling at me around 10k miles and that’s where I’m comfortable. My fiancee’s 2016 Jeep usually says to change the oil around 8k. I figure if the engineers put the oil life meter in the car that I should follow it. Plus the lab sheet proof was a big one for me - if they were impressed with the oil I am as well.
This post was edited on 4/17/18 at 8:44 am
2
Posted on 4/17/18 at 9:03 am to bapple
I'm guessing they calibrate the oil change intervals from the factory according to really cheap conventional dino with a factor of safety included. With a top tier synthetic, you can probably double what the oil life monitor says.
Mine usually starts telling me to change it around 5500, but I have run it up to right under 8000 with no noticeable differences in the oil coming out. Having said that, filters are also a major consideration when extending oil change intervals
Mine usually starts telling me to change it around 5500, but I have run it up to right under 8000 with no noticeable differences in the oil coming out. Having said that, filters are also a major consideration when extending oil change intervals
Posted on 4/17/18 at 9:05 am to bapple
3000 mile recommendation is an oil company driven directive. If we all did that over the standard 5000 miles back in the 70's 80's and early 90's Oil companies could sell about 35% more motor oil in a year on avg. Basically driving up sales and profits. Oil tests on modern natural oil compounds are showing your high end motor oils like Castrol, Pennzoil, etc. types do not start to show any beginnings of break down before about 7500-8500 miles. And most all of your synthetics show absolutely no breakdown or loss of viscosity before 10K-12.5K miles. I have never changed oil in any vehicle I owned before 7500 miles. Never any motor issues and traded in or sold many vehicles with more than 250K to 350K miles.
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