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Old 01-10-2008, 12:01 PM   #1
Scooby Newbie
Member#: 39983
Join Date: Jul 2003
2003 WRX Wagon

Default engine flush/cleaner additives? good for boxer engines?

Hi all,

I'm ashamed to ask such a broad general question but It has come to this.

So I bought a box of oil that came with a bonus engine flush additive. It was pennzoil engine flush. (it was cheap so I picked it up. never going to touch pennzoil again in the future. my mileage dropped like a bitch).

I've never used any sort of engine cleaners before but I know you're only suppose to use the additive on the tank of gas right before an oil change since a lot of the crap will collect in the oil and oil filter.

But is this "engine flush" stuff safe for the boxer engine or will there be complications due to the boxer layout? my mileage is ~110k KMs so it's defintely up there. Are there any pitfalls with using this stuff that I should be aware of? just getting engine flush virgin cold feet... just need to know if it's safe to do so before going ahead with it.

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Last edited by mr_yellow; 01-10-2008 at 12:26 PM.
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Old 01-10-2008, 03:01 PM   #2
Chino Bling
Scooby Specialist
Member#: 129743
Join Date: Oct 2006
Chapter/Region: TXIC
Location: DFW
2009 335i
Jet Black


i've used some and it was just fine...
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Old 10-23-2011, 10:06 PM   #3
Scooby Newbie
Member#: 298800
Join Date: Oct 2011
Chapter/Region: Tri-State
Location: Tri-State, North Jersey

i have tried it on my legacy, works great, makes the engine a lot more smooth
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Old 10-23-2011, 10:20 PM   #4
Scooby Specialist
Member#: 151079
Join Date: Jun 2007
Chapter/Region: MAIC
Location: College Park, MD
2005 2.5RS RBP
too many friction losses


You don't need some special oil to flush the oil system. Just run an oil for 100 miles or so and then change it again. That's all you need for a flush.

Pennzoil is fine, don't judge your experience with Pennzoil based solely on this "flush additive package" crap.
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Old 10-23-2011, 10:21 PM   #5
👏 Big Ron 👏
Member#: 18062
Join Date: Apr 2002
Chapter/Region: MAIC
Location: I can save you a ton of cash
on car parts so PM
me b4 j00 buy


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