Valvoline Dino 75w-90 GL-5 20k mi Forester 5MT

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This was run between 2,500 and 22,400 miles in my Forester's 5-speed manual transmission. Viscosity was flagged. This was a Wix prepaid analysis kit. There was a bit of black sludge on the magnetic plug, but nothing that I haven't seen before. I didn't see anything shiny on the plug or in the oil. I'm concerned about the level of iron, and the viscosity is obviously low. Thoughts? I refilled it with the same, but maybe I should switch to something else.
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Oil			Valvoline Conventional 75w-90 GL-5
Miles on Oil		19,900
Miles on Car		22,400
Sample Date		7/7/14

Aluminum		11
Chromium		2
Iron			119
Copper			6
Lead			0
Tin			0
Molybdenum		0
Nickel			0
Manganese		0
Silver			0
Titanium		0
Potassium		6
Boron			358
Silicon			24
Sodium			3
Calcium			84
Magnesium		0
Phosphorus		1808
Zinc			197
Barium			0


cSt Viscosity @ 100°C	10.9
Water %			<0.05
Solids %		<0.1
TAN			2.97
 

Bandito440

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Originally Posted By: Bottom_Feeder
As close as Valvoline looks to be what Subaru transaxles call for, my Impreza did not like it. Shifts into 1st and reverse from a stop were always crunchy. I finally spent some money on genuine Subaru Extra S and it cured the problem. http://www.amazon.com/Subaru-75W90-Extra-Transmission-Fluid/dp/B007L6Q1EK
How about that! Last time I looked, it was available only in 5-gallon buckets. I may go that route. Red Line 75w-90 NS is my other thought. Ah. I see now. That's rebottled by a dealer.
 
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Wow, it sheared and dropped two grades to 80. In only 20k. From [email protected] according to the PDS its down to 10.9cSt. Just under an 85. 0/10 would not use. Would use the 80W90 instead or switch to synthetic 75W90 if you need low temperature performance.
 
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Trans is still young and breaking in. Shearing is excessive but usually normal in a manual. Try another gear oil. Idemitsu, Eneos, Redline, Motul, Torco... have nonLSD 75w90 gear oils.
 

dnewton3

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I would not worry about the Fe; this is break-in residual. You dumped the OEM fluid in 2.5k miles, and this is only the second load. Improvement should come on the next few OCIs. I'd say overall, the Valvoline didn't do a bad job at all, despite the Vis loss. The Fe is expected in such a young manual tranny unit, and will never be as "low" as engine UOAs.
 
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Bandito440

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Thanks for the feedback. I'm amazed at how much the viscosity dropped. Pablo hooked me up with enough Amsoil Severe Gear 75w-110 for the transaxle and rear differential. I'll run that for 20k miles and get another analysis as long as the shifting remains reasonable and I still have the car.
 
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