Recent content by Stephan_G

Originally Posted By: Pablo Then you call a TBN of 3-4 "almost gone". Please. Some of these have been in the crankcase a year. None of these are example of "shot" sig series. I assume veryHeavy was referring to that TAN/TBN was almost at 1:1, indicating a need for an oil change soon.

Originally Posted By: veryHeavy The TBN is gone on this sample. Should have been changed at 15000, far short of the 25k amsoil promises That's OE, not SS. Amsoil only rates OE to manufacturer recommendations, IIRC.

I went by what Mazda has written in the owner's manual. I figure that's the safest way to avoid any possible warranty claim issues, if that came up. I do wonder if anyone has done any actual wear studies with new engines and various types of break-in procedures, though. Just like everything...

Regarding engine break-in, I like to follow the manufacturer recommendation, which is usually avoiding constant load, full throttle, and high RPM for 500-1000 miles. Originally Posted By: Artem Have you thought about using this option and let the car suggest when it's time to change the Lube...

Originally Posted By: Kuato Amaoil makes a 0w40.... Oh, I know. I found a thread here that was specifically comparing oils for the AMC 4.0, and it found that 40 weight wasn't any better than 30. However, it's what's available in T6, so it's what I ran. I figure since this Jeep has probably...

Yes, I have the 4.0. I have a thing for Inline-6 motors. Parents had an '89 F-150 with the 300-6 in it that I drove as a teenager. Sixes in trucks/truck-like-vehicles seem to be indestructible. Torquey beasts! I was torn between the Rotella T6 and GC 0W-40. I might run that next time just to...

Originally Posted By: Kuato I'm an Amsoil fan also so on your oil choice. I've been a fan of it since forever - my dad got it for the first time in the early 90s for a '65 VW Beetle, and said it brought engine temps down so much, you could touch the block after a drive (air-cooled). Don't...

The 11 ppm was the last sample, at 22800 miles. The 16 ppm was from the first sample. I did not get a TBN sample. The report read TR for that entry; typed that in wrong too. I was trying to get the columns to line up and it was a pain, sorry.

This is my first post; I've lurked and learned for a long time. 2015 Mazda3 with the SkyActiv 2.5L engine. First owner. I ran factory fill for 1000 miles, then Amsoil Signature Series 0W20 with the OEM filter, as there wasn't consensus that the Amsoil (or any aftermarket) filters had the...