-- oops, sorry I posted this to the wrong forum list, this is where it should be --
This is the UOA for the first oil change on this car. The engine is Subaru's new fully redesigned 2.5 L engine (FB25) with a timing chain.
Oil: Factory fill over about 2 weeks in late spring (yes, I did the break in driving quickly), no top up oil (oil level didn't drop at all during break in). I don't know what viscosity the factory fill is, but the engine is specified for Synthetic 0w20
Oil Filter: Factory filter, with magnet on filter
Air Filter: Factory filter
Vehicle: 2011 Subaru Forester 2.5X Touring Package, 1,400 miles (2,300 km) on car and oil -- first oil change
The driving was "break in" style, revs kept under 4,000 rpm, frequent varying of revs, no hard acceleration, mix of city and highway driving.
Analysis was done by Toromont Caterpillar ($CDN 20 including tax and shipping).
Iron 20
Chrome 0
Moly 974
Aluminum 5
Copper 83
Lead 0
Tin 1
Titanium 0
Nickel 0
Silver 0
Silicon 229
Sodium 9
Potassium 5
Zinc 918
Magnesium 13
Phosphorus 939
Barium 4
Soot UFM # 0
Sulfur UFM # 22
Oxidation UFM # 18
Nitrates UFM # 9
Viscosity cSt at 100C 7.15
TBN 5.0
TAN 1.10
Antifreeze negligible
Fuel Dilution negligible
Water negligible
The comment from Toromont was "Wear levels are consistent with normal break-in wear"
The break-in recommendation in the Canadian owner's manual indicates a break-in period of 1,600 km. The first oil change (Canadian Schedule) is supposed to be at 8,000 km. In the US, the first oil change is specified at 5,000 km (3,000 miles). I usually like to change my oil fairly soon after break-in. Unlike my 2010 Honda Fit, where Honda specifically recommends NOT changing the oil until the first (Maintenance Minder) indicated interval, there is no information from Subaru as to whether the factory fill is "special" or not. Based on this UOA, I would suggest that the factory fill is high quality (e.g., look at the Moly, Viscosity, Zinc, and TBN numbers) and I likely could have safely kept it in for several thousand more km.
I'm now running Pennzoil Platinum 0w20 and a factory (Toyko Roki) filter, and will likely do a UOA on my next oil change.
Comments?
This is the UOA for the first oil change on this car. The engine is Subaru's new fully redesigned 2.5 L engine (FB25) with a timing chain.
Oil: Factory fill over about 2 weeks in late spring (yes, I did the break in driving quickly), no top up oil (oil level didn't drop at all during break in). I don't know what viscosity the factory fill is, but the engine is specified for Synthetic 0w20
Oil Filter: Factory filter, with magnet on filter
Air Filter: Factory filter
Vehicle: 2011 Subaru Forester 2.5X Touring Package, 1,400 miles (2,300 km) on car and oil -- first oil change
The driving was "break in" style, revs kept under 4,000 rpm, frequent varying of revs, no hard acceleration, mix of city and highway driving.
Analysis was done by Toromont Caterpillar ($CDN 20 including tax and shipping).
Iron 20
Chrome 0
Moly 974
Aluminum 5
Copper 83
Lead 0
Tin 1
Titanium 0
Nickel 0
Silver 0
Silicon 229
Sodium 9
Potassium 5
Zinc 918
Magnesium 13
Phosphorus 939
Barium 4
Soot UFM # 0
Sulfur UFM # 22
Oxidation UFM # 18
Nitrates UFM # 9
Viscosity cSt at 100C 7.15
TBN 5.0
TAN 1.10
Antifreeze negligible
Fuel Dilution negligible
Water negligible
The comment from Toromont was "Wear levels are consistent with normal break-in wear"
The break-in recommendation in the Canadian owner's manual indicates a break-in period of 1,600 km. The first oil change (Canadian Schedule) is supposed to be at 8,000 km. In the US, the first oil change is specified at 5,000 km (3,000 miles). I usually like to change my oil fairly soon after break-in. Unlike my 2010 Honda Fit, where Honda specifically recommends NOT changing the oil until the first (Maintenance Minder) indicated interval, there is no information from Subaru as to whether the factory fill is "special" or not. Based on this UOA, I would suggest that the factory fill is high quality (e.g., look at the Moly, Viscosity, Zinc, and TBN numbers) and I likely could have safely kept it in for several thousand more km.
I'm now running Pennzoil Platinum 0w20 and a factory (Toyko Roki) filter, and will likely do a UOA on my next oil change.
Comments?