UCL and dual additives

Are they all snake oil or do they actually have any positives effects?

*fual additives

Fuel
Just fuck me up senpai

I don't get better mpg but it does effect how my truck revs.

Lucas oil is considered a good brand for additives. I've used their transmission conditioner and 2 years later my tranny still hasn't blown up or anything. I bought giant bottles of the fuel stuff but I got bored of putting it in all the time. I don't feel any difference. Lucas oil fuel additive is very much different than the others. Most others are solvents, Lucas is actually oil based. I think what you're really doing is making the gasoline more oily which has some advantages.

They will help your injectors and fuel system.
If you have some old car you'll benefit from it.

I have a Z31, I've done all the required maintenance and replaced most components. I add fuel injector and fuel system treatment and get 18 mpg around Miami. Its a 30 year old car and was originally rated to 15 mpg city so I think the stuff works as long as you keep everything in check.

I've noticed improvements with injector cleaners, though octane boosters and "tune-up in a bottle" kind of stuff seems like a crock of shit

I know from experience that putting Sea Foam in your gas will clean out a carburetor that's sat for too long. I imagine it would have a simaler effect on dirty fuel injectors.

Other membership car forums had reviewed various fuel additives. Notably, the additives that had detergents to clean the engine versus toptier gasoline's additives. First of all, the bottles are not 100% additive in some cases. The highest percentage of over the counter PEA additive was ReGane Fuel System Cleaner (not the fuel injector cleaner which has no PEA) with TechRon being in the lower half of the evaluated PEA additives.

Once you have an idea of the percentage, if it is an 8 ounce bottle and it has 50% actual active ingredient, then what you have is 4%. Now, you know the size in gallons of your gas tank. 4 ounces of additive in that many number of gallons gives you a percentage.

Since the EPA minimum for detergent is published and one of the toptier gas providers states its amount up front at being 5X the EPA minimum requirement, you know the percentage of PEA additive in Costco fuel. So, does adding even the 4 ounces of additive compare to just buying it from Costco in the first place? Or will adding the ReGane bottle (which costs quite a bit) be economically competitive?

No they wont. It's a complete fucking sham. If you want to help your injectors, take them out and put them in an ultrasonic bath.