Engine oil Mobil or OEM Subaru

OEM Subaru Engine oil

No issues with 5w-30. Switched my 21 Crosstrek to it due to the summer months coming. Little dip in mpg but the engine runs smoother.

Pros: engine runs smoother
Cons: little dip in mpg
Vehicle: Subaru
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Mobil Engine oil

Mobil 1 full synthetic 5w20 or 5w30 is best in my opinion, and I’ve always just used a fram ultra from Walmart never had any problems and my K20 seemed to enjoy it

Pros: K20 seemed to enjoy
Cons: none
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Mobil Engine oil

I personally have run Mobil1 0w-30 in my GSR for the past 250,000+ miles, since back in the mid-2000's.

Pros: long-term reliability, high mileage use
Vehicle: Honda Integra
Mileage: 402335 km
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Mobil Engine oil

Of course, after I bought it I dropped the oil and ran what I like to run in my cars/trucks which a Mobil Delvac product 5w-30. It’s a synthetic but it’s more used for the heavy duty market. I checked the oil some 4000 miles later and it had a reddish look to it just like yours. After the next oil change I never saw it again.

Pros: synthetic, heavy duty
Cons: reddish look
Vehicle: Ford Transit
Mileage: 4000 km
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Mobil Engine oil

Yooo this happened to me, have you used a high mileage type of oil? Apparently when they start to burn up they can change to a reddish hue, I went back to normal Mobil 1 and it’s back to gold

Pros: back to gold
Cons: reddish hue
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OEM Subaru Engine oil

0w20 provides your engine with more wear protection .

There is minimal difference between 0w16 and 0w20, with 0w20 provided marginally better wear protection and 0w16 providing slightly better fuel efficiency since it's slightly thinner and provides less internal resistance.

Pros: better wear protection
Cons: less fuel efficiency
Vehicle: Subaru
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