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Old 02-04-2013, 01:48 PM   #23
thejordan
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Quote:
Originally Posted by BlueFocusSE5 View Post
You made the statement that Mobil 1 5W-30, "is garbage". Does Exxon/Mobil know this?

Of what particular experience does a company that manufactures heavy duty diesel oils have to offer gasoline powered cars?

Used oil analysis is to determine the condition of a particular engine and it's oil and not to make broad generalizations.
The 5w30 mobil1 has been known to act as a 5w20 due to it's premature shearing. This is specific to the 5w30.

And rotella is not just for diesel, it's for gasoline vehicles as well. It has better/more detergents to last longer and provide better results.

here are a few quick examples that I pulled up just now, there's a ton of data on this so get off your high horse:

There are plenty of UOAs on bobistheoilguy.com that show Mobil 1 5w30 performs poorly.

look at viscosity results

Here's a 2011 wrx w/ 5k on the odometer


here's a 2011 STI w/ 3k on the odometer, Rotella on the left, Mobil1 5w30 on the right


M1 EP 5W30 7538 Miles - 2011 WRX - Bob Is The Oil Guy

Mobil1 5W-30, Subaru WRX, 4,900 miles, Cu prob? - Bob Is The Oil Guy

1k miles on odometer


Mobil 1 EP 5W-30, 7232 mi, 2000 Subaru Impreza 2.5 - Bob Is The Oil Guy




all of these show mobil 1 breaking down to a 5w20 within 5k (as early as 1k in some UOAs)

I highly suggest you browse bobistheoilguy. Turbo cars are much more abusive on fluids. And in hotter areas, the 5w40 holds up extremely well.
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