5.0 out of 5 stars Royal Purple Gas Additive

D.G. · August 2, 2021

(function() { P.when('cr-A', 'ready').execute(function(A) { if(typeof A.toggleExpanderAriaLabel === 'function') { A.toggleExpanderAriaLabel('review_text_read_more', 'Read more of this review', 'Read less of this review'); } }); })(); .review-text-read-more-expander:focus-visible { outline: 2px solid #2162a1; outline-offset: 2px; border-radius: 5px; } One of the best injector cleaners tested in a laboratory. Quality product, expensive though.My customers tell me it really smooths out their engine and worth the price

5.0 out of 5 stars Clean engines are a good thing - this keeps it that way

J.P.K. · June 19, 2021

I like this stuff better than Techron. I use a bottle every third tank on all our cars.

4.0 out of 5 stars Sadly requires, a arm and a leg,

D.C. · April 9, 2021

Have used for years, bought by the case years ago when price was reasonable, now the cost is to high for the benefits...

5.0 out of 5 stars 💪💪💪

c.s.L. · February 17, 2020

Very good

5.0 out of 5 stars Great mileadge

S.M. · February 16, 2020

Really helped

1.0 out of 5 stars ONLY 5 IN THE BOX!!!

T. · December 19, 2020

Opened box that was inside an unmarked box{so it wasnt the delivery driver} to find it had been re-taped and 1 can of product was missing..poor quality control.