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Lexus Air/Oil Separator
Lexus Air/Oil Separator - Image 1 of 0
Lexus Air/Oil Separator - Image 2 of 0
Lexus Air/Oil Separator - Image 1 of 0
Lexus Air/Oil Separator - Image 2 of 0
Lexus Air/Oil Separator - Image 1 of 0
Lexus Air/Oil Separator - Image 2 of 0

RR Racing Air/Oil Separator for Lexus IS 250 2006+

8 Reviews
$
Usually Ships in 2 to 3 Weeks
Product Code: IS2AOS0001

The 250 Air/Oil separator is a by product of our IS-F track development program. We finally added an air/oil separator to our IS250 line. As IS250 does not have port injectors, it can benefit the most from our Air/Oil Separator as it gets a lot of oil in its PCV line.

During on track testing and data logging, it became clear that the PCV (Positive Crankcase Ventilation) was allowing for significant ingestion of oil into the engine (see diagram in the photo gallery of this product). Oil ingestion results in ignition retard due to the low octane of engine oil as it burns up. Additionally, oil burning in the engine results in carbon deposits on the intake valves, pistons, and combustion chamber which further increases the propensity for power-robbing detonation. You don't have to take your IS to the track to benefit from our Air/Oil Separator. Anyone who drives aggressively on twisty roads with hard acceleration and deceleration will benefit from avoiding oil ingestion into the engine.

The RR-Racing Air/Oil Separator is an fully sealed design featuring an advanced zero maintenance air oil separator with a level indicator for easy inspection. All you have to do is check the level indicator and periodically empty the canister.


All components in this product are proudly engineered and manufactured here in the United States of America.


Please click on one of the links below for more relevant detailed information about our approach to engineering great products for your Lexus:

RR Racing Lexus IS-F Project.

Compatibility Table
MakeModelYear Range
Lexus IS250*2006+
*DOES NOT FIT RIGHT HAND DRIVE CARS

REVIEWS

Average Rating:
( 8 )
Bernd Adam from Ismaning, Bavaria Germany
June 11, 2025
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Darwin from Arlington, VA United States
March 30, 2025
It actually works!!
I was a little doubtful just due to the amount of carbon buildup I had before cleaning it and installing this. But weekly I’m dumping about a tablespoon of oil. Definitely recommend purchasing right after cleaning all the carbon on intake valves and use it as a preventative and make sure to do preventative maintenance on your vehicle so it would actually keep it clean.
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Dorotea Sprinc from Edmonton, AB Canada
August 31, 2024
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Anonymous Person from Honolulu, Hi
May 19, 2024
Air/Oil separator for Lexus IS 250
I found that installment was fairly easy and the visual instructions surely helps!
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Stephen from PASADENA, CA United States
May 7, 2024
Great AOS
Great kit with quality hardware and perfect fit! Works great and is catching all the gunk before the air is recycled back into the intake! A must have for GDI engines regardless if it's track or daily driven!
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