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    Anyone try or heard of 'Fuel Doctor' from Australia?

    In my search of a convenient measure and pour solution for my TC-W3 and Redline SI-1 cocktail, came across this fuel system cleaning additive from Australia: https://fueldoctors.com.au/ Fuel Doctor Fuel Conditioner is specifically formulated for Diesel, Petrol and two-stroke engines to clean...
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    Mobil Delvac 1 ESP 5W-40 CK-4 - 4,639 Miles - 2010 Subaru Impreza WRX EJ255

    5th UOA. Don't think Potassium is significant enough to worry about. Same Mazda RX-8 (N3R1-14-302) Tokyo Roki Filter since acquiring the vehicle with 108,540 miles on Nov 20, 2020. Entire OCI: TC-W3 640:1 (Pennzoil Marine Premium Plus) + Red Line SI-1 2.5oz
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    Injector Cleaning Service Recommendations

    Thinking of having an extra set of injectors I have cleaned to replace the (assumed original and unserviced) ones on my 130k 2010 WRX before it gets too cold. Didn't hear back from the user here who offers the service and their website didn't work last time I checked. Any recommendations or...
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    Mobil Delvac 1 ESP 5W-40 CK-4 - 4,296 Miles - 2010 Subaru Impreza WRX EJ255

    4th UOA. Switched from Castrol Edge 0W-40 A3/B4 used in all previous OCI's. Almost right after the change went on a 3800 mile round trip to Tucson, AZ, including a 200 mile round trip to Phoenix while there. Same Mazda RX-8 (N3R1-14-302) Tokyo Roki Filter since acquiring the vehicle with...
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    Castrol Edge Euro 0W-40 A3/B4 - 3,826 Miles - 2010 Subaru Impreza WRX EJ255

    Third UOA. Not the 30k OCI everyone fiends for but two different labs for comparison. Especially fuel dilution, since apparently one's calculation is more or less useless. Same Mazda RX-8 (N3R1-14-302) Tokyo Roki Filter since acquiring the vehicle with 108,540 miles on Nov 20, 2020. 584 mi...
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    Carbon Mining - TC-W3 + Red Line SI-1

    Currently using TC-W3 at 500:1 ratio in 2010 WRX and wondering if adding a maintenance dose (2.5oz to 15gal) of Red Line SI-1 is a good idea. Used Borescope to inspect pistons while doing plugs and saw significant amounts of carbon deposits, with a clean spot where fuel seems to be making...
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    Castrol Edge Euro 0W-40 A3/B4 - 3,762 Miles - 2010 Subaru Impreza WRX EJ255

    My second UOA. The sample was the very last bit in the sump. Like an idiot I forgot to have the vial ready. It was about half drained when I remembered and grabbed the unopened Blackstone envelope in a panic, then realized I wouldn't get it out in time. So quickly put the drain plug back in, and...
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    WRX - Fear of Red Line 5W40 in Chicago Winter

    Next OCI coming up. Been running Castrol Edge 0W40 but bit the bullet and decided to try Red Line 5W40. Mainly to change things up, but potentially improve wear and protection. Less than 200 miles away. Figured 5W40 would be fine year-round, but with temps getting into the teens and single...
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    Castrol Edge Euro 0W-40 A3/B4 - 3,305 Miles - 2010 Subaru Impreza WRX EJ255

    My very first UOA. Opted for a TBN as well. Blackstone Laboratories. Running same oil and Mazda RX-8 (N3R1-14-302) Tokyo Roki Filter since acquiring the vehicle with 108,540 miles on Nov 20, 2020. ~3k OCIs - 1st at 62 miles into ownership (2,645 miles on existing oil) - this one 4th at 118,321...
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