Mobil 1 HM - 5k miles - '94 Miata

[JGmazda]

My second UOA. Previously ran Maxlife Synth 10w30. TBN was only 1.0 on the Maxlife for the same 5k miles.

I thought I'd give Mobil HM a shot as I like the "SL" rating. From what I've read, the elevated Iron level is nothing to worry about. The Silicon is probably due to a recent TB change and gasket sealant. I like that the TBN was 3.0 and also the higher viscosity didn't hurt here in the Phoenix heat.

Comments welcome. Thanks!

http://i525.photobucket.com/albums/cc340/Spanksenior/Auto%20Stuff/BlackstoneUOASept09jpg.jpg[/IMG]]MIATA '94 UOA

 

[ZZman]

Was this a 10w30 or a 10w-40?

The report says both and the Vis is high.

 

[addyguy]

It must have been the 10W-40. a 10W-40 wouldn't oxidise up to 13cst in 5k miles.....unless, with THAT much Si and insols. in the oil, it simply become a gritty slurry.....

 

[JGmazda]

It is 10w30 High Mileage

 

[ZZman]

That seems odd then.