505CRF Fuel System Treatment, 16 FL OZ

I ran engine for 60 minutes high idle, fan in front of radiator, then oil change. Did it do anything? Yes. 2000 Honda V6. Had a minor throttle response lag when accelerating from idle, for instance at a stop sign. Not like an accelerator pump lag, simply a smoothness issue. After treatment the engine was quieter, smoother, and this irritation was gone. If your engine is in good mechanical condition but has many miles logged, this product just might be worthwhile. I can't recommend otherwise. Like any additive, it will not repair a mechanical problem. Think maintenance not repair. 5 stars because it did make a positive change. If a 2000 V6 Honda which is already a quiet smooth engine can be better (i.e. more like it was new) I have to deliver 5 stars. I also suggest their fuel treatment at same time period.

Why did you pick this product vs others?:I bought this after watching Scotty Kilmer on YouTube. I have a 2006 Hummer H3 with 250,000 miles and figured a good system clean couldn't hurt. I was honestly surprised at how well this stuff worked. There was a noticeable performance improvement which I've found to be rare for most fuel cleaning products.This stuff does exactly what it claims to.

This works well! I have an '07 honda accord 2.4L LX with 190k, and it had started burning oil like most cars do. I was pissed because I've had the car 13 yrs., and religiously changed the oil with the best synthetic and never beat on it. I tried the top end cleaner routine where you remove the plugs and directly pour the cleaner into the spark plug holes,(ac-delco Top End cleaner), and it did help. The theory being your ring and cylinders aren't worn out, rather, carbon and other crud has built up in the ring valleys and around them, seizing them up, letting oil get by. I ran this at 2200 rpm for 15 min., then drained. It was a weird khaki green and brown color. Filled it with castrol high- mileage synthetic and new filter. Motor definitely quieter and smoother. Much better acceleration and power. Definitely worth the money!

Seems to work great. Notice a difference after a hour of running engine. Next morning engine started and idled much smoother and a little higher on RPM. better throttle response for sure. Expensive but most likely worth it.

I have a Honda 2005 Accord with an engine light on. As turns out upper-temperature sensor issue. I would resset it but it would eventually come back on.Decided to give this a try. The engine light never came back on. The most expensive gas treatment I have ever bought and it works..Introduced by YouTube mechanic Scotty Kilmer.Will package in a plastic ziplock bag and no leakage during the delivery.

Hey, I've tried many a thing, and few were decent, but this stuff, this brand, actually works!The fuel additive was a game changer, so i tried this oil additive.Another game changer! The car runs better, it's more spirited.Tip of the hat to Scotty Kilmer for showcasing this company - Scotty says it like it is, and my car thanks him.If you have an older vehicle, this is where you give the engine a face lift - my car runs "years younger", and I've had it for nearly 10 years, and it's 25 years old! I know what I'm talking about.I'm going to repeat the oil treatment later in the summer before an oil change and really clean my car's oil system. One treatment has been very effective, and I could coast, but with a car this old, there is likely a bit more buildup in the system.

The real deal. 4 or 5 treatments of this additive just prior to each oil change will recondition internal engine to nearly new operative condition. In concert with the 505 CRF Fuel System Treatment which burns off carbon deposits from intake and ignition components - it maintains younger engines and restores older ones better than all other additives. My grandsons 17 year old RAM 1500 V-8 now runs like new thanks to these well engineered products.

Within 30 miles I started feeling the difference in my old ‘04 Pilot. Had more get up and go, especially from a stand still. I was hesitant a bit at the price (I usually use Lucas), but the improvements were vast! Well worth the buy!It does smell awful though. You will need a funnel to use it.