Wear test article.
- Thread starter dodge man
- Start date
- Views: 1331
creekbend
Super Star Member
Thanks for posting and providing the Link.
crazyal
Super Member
The problem is that it's all about race engines. When talking race engines you are talking about turning high RPMs. Because of this you need to run stronger than normal valve springs to make sure the valves keep up with the pistons. When I was dirt track racing I would go from about 6000 RPMs in the corners to near 7500 at the end of the straights. It's 1/4 mile track and the times listed in your link are about similar. We ran 20 races a year with at least two races being twice the normal length. I would replace the cam after two seasons. It didn't show much signs of wear but the dyno proved that it was starting to compromise performance. In some forms of racing the oil is heated and pumped through the engine before the engine is started, partially due to clearance issues while cold and also to avoid any chance of damage that could cause the loss of the motor during the race.
I'm not sure if he took into account that race engines usually see higher temperatures and often need thicker oil. I know that my engine builder would have laughed at me if I ran 30w oil. Even with a reduced speed water pump and an over sized aluminum radiator at the end of a race I would have to let the engine run at low RPMs to get the heat out of the engine.
In a normal (non race) vehicle the maximum amount of wear is going to happen at start up. That's when metal on metal is the worse since the oil is struggling to flow. The colder the temperature of the oil the worse it's going to be. The ASTM test at 100f (that he didn't like) is actually compromise. Even at temperatures we think are fine, say 75f, there's still quite a bit of wear happening.
I'm not sure if he took into account that race engines usually see higher temperatures and often need thicker oil. I know that my engine builder would have laughed at me if I ran 30w oil. Even with a reduced speed water pump and an over sized aluminum radiator at the end of a race I would have to let the engine run at low RPMs to get the heat out of the engine.
In a normal (non race) vehicle the maximum amount of wear is going to happen at start up. That's when metal on metal is the worse since the oil is struggling to flow. The colder the temperature of the oil the worse it's going to be. The ASTM test at 100f (that he didn't like) is actually compromise. Even at temperatures we think are fine, say 75f, there's still quite a bit of wear happening.
OP
dodge man
Super Star Member
The article has its flaws I think. He went on and on about some kind of wear additive and he ranted about high zinc oil a lot.
Markcuda
Veteran Member
If any one has time to read the whole article, he has wayyyyyyyyyyyyy to much time on his hands.LOL
crazyal
Super Member
That part almost made it sound like he was a salesman pushing it, lol. The funny thing was it reduced some of the tested oils and the top 3 tested oils were with a different oil treatment.
