2015 mazda 3i AT, 68k miles.
14k miles between oil changes, mostly highway driving.
dont remember which brand 0w20 i used for this 14k miles. (i've used Penzoil, Mobile 1, Castrol, Valvoline, and Quaker. whichever is cheapest at the time. :surprise
"This oil was in use for about 14,000 miles and that's a respectable interval for this engine.
The average run we see from one of these 2.0L engine is just 7,000 miles.
With that in mind, it's nice to see all metals testing within the average range. To be sure, iron is a bit elevated, but that's expected on longer than average oil runs because of the way that metal accumulates in the oil with use. Fuel dilution was present at 1.0% of the sample, but that's a harmless find and no other contamination was found. Check back to start trends and monitor.
So far, so good."
think i'm going to try 20k miles with Penzoil 0w20 (what i have now), then 20k miles with Mobile 1 15k mile 0w20.
and get oil reports on each
14k miles between oil changes, mostly highway driving.
dont remember which brand 0w20 i used for this 14k miles. (i've used Penzoil, Mobile 1, Castrol, Valvoline, and Quaker. whichever is cheapest at the time. :surprise

"This oil was in use for about 14,000 miles and that's a respectable interval for this engine.
The average run we see from one of these 2.0L engine is just 7,000 miles.
With that in mind, it's nice to see all metals testing within the average range. To be sure, iron is a bit elevated, but that's expected on longer than average oil runs because of the way that metal accumulates in the oil with use. Fuel dilution was present at 1.0% of the sample, but that's a harmless find and no other contamination was found. Check back to start trends and monitor.
So far, so good."
think i'm going to try 20k miles with Penzoil 0w20 (what i have now), then 20k miles with Mobile 1 15k mile 0w20.
and get oil reports on each