M1 - 10W30/15W50 - Mazda Miata

[OMCWankel]

Mobil 1 10W30 (3 qt) Mobil 1 15W50 (1 qt) blend
-1997 Mazda Miata, MT, 1.8L, 4 qt oil capacity, 133,602 miles on unit
-4 oz LC and 4 oz Schaeffers 132 added at change
-Mobil 1 M-108 oil filter
-K&N air filter
-93 octane gasoline, with 2 oz FP60 added per 8 gal fillup.
-lab is Blackstone

3000 mi on oil

aluminum.......2
chromium.......0
Iron...........6
copper.........4
lead...........1
tin............1
molybdenum....66
nickel.........0
manganese......0
silver.........0
titanium.......0
potassium......0
boron.........88
silicon........8
sodium.........4
calcium.....2380
magnesium.....15
phosphorus...787
zinc.........918
barium.........0

viscosity...65.7
flash point..395
fuel........ collant......0.0
water........0.0
insolubles...0.3
TBN..........4.7

I am pleased with this report. My thanks to Terry Dyson for his analysis\
on this unit.

All comments welcome!

 

[JAG]

Overall good. The 15W-50 addition was likely a good choice to boost viscosity and anti-wear additives.

 

[TR3-2001SE]

Looks great to me. I run the 0w-40 in my Miata but looks like this would also be a great oil combo to try. This was the regular M1 right? I run this viscosity combo with M1 EP in my Honda Accord with great results so far also.

 

[OMCWankel]

You caught my typo, TR3-2001SE! It is indeed M1 10W30 EP. I would not use the regular M1 products anymore, as the less than steller UOA's on this board show. The Gen 1 Miata's have undersized cooling systems, so I probably will not go lower than a 10W30 in mine. I just leased a Gen 3 Miata, 2007. It specifies 5W20 in the manual, and has a robust cooling system.