LS1 piston slap GONE after switching M1 to MaxLife

[ProStreetCamaro]

When I got my 99 SS camaro it had no piston slap. After I changed the oil to mobil 1 I didnt put 2 and 2 together when I started to hear piston slap untill it warmed up. Just figured it was another loose LS1.

Well yesterday I decided to go back to Dino oil and low and behold the slap is 99% gone. I can barely hear it for a couple seconds and thats it. Now I got to thinking. I have noticed mobil 1 tends to drip off the dipstick easily where as dino oil doesnt. Makes me think maybe good old dino oil actually clings to engine parts better.

Any thoughts on this? I have seen a 350 oldsmobile torn down after 300K+ miles on mobil 1 with zero sludge, still had factory cross hatches, and bearings still looked almost new. This has me tottaly baffled.

 

[glenncof]

What weights ? Same ?

M1 tends to run lower viscosity for a given weight. That's neither bad nor good by itself.

Check the data sheets, cSt 40C.

 

[Travis99LS1]

Hey nice car man..There are numbers of people on LS1tech.com that have said Mobil 1 5w30 has made there piston slap worse. Nobody really has a good explanation for it though...I would just stick with the maxlife if it made it that much better....Some on there though have claimed that the new High Mileage Mobil 1 10w40 has helped there piston slap a bunch..so if you ever want to try synthetic again maybe you could give that a try.

 

[Spewn]

Could be worth checking out Maxlife Synthetic, from what I've read it has many of the goodies that Maxlife has in its add package.

 

[ProStreetCamaro]

I was using 10W-30 Mobil 1 and just switched to 5w30 MaxLife.


Travis nice choice of car! I check out that site once in a while but not to often. Think I am gonna head over there now and read up on it. I just find it REALLY odd that Mobil 1 caused that problem. To be honest even when fully warmed up I could still hear it slightly if I was against a building such as being in a bank line. I dont know how its possible an oil can cause that problem.

Spewn I have been looking and cant seem to find the maxlife full synthetic. I am going to have blackstone test my oil at 3K to see whats up and if all looks well I am going to stick with it.

 

[DOHCtor]

Hummmm.. noticed the very same thing with my dad's 2003 Ecotec... But the slap actually disseapeared after a switch to Amsoil AFF Powersport 0w40 was made... and i did not had luck with M1 too, mostly because of oil consumption issues...

go figure...

 

[ThirdeYe]

I haven't noticed any decrease in noise in my mom's 3.1 in her slapping Malibu. I changed it to 5w30 MaxLife after using regular Valvoline for the first 55k or so.