PRI For Recreational Marine

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Power Or Sail - No boater today should be without PRI's industrial grade marine fuel treatments in every tank - the same PRI chemistry dosed online into the fuel of the world's great ships and commercial marine vessels.

Unlike "consumer-grade" fuel additives, PRI chemistry is an industrial product designed to protect the world's largest engines against the world's worst fuels. That's why PRI is unmatched in providing protection to your marine engine and fuel system. Find PRI today at Boater's World, West Marine, Boat U.S., Camping World, and our network of marine stores, marinas and marine fuel suppliers. 

PRI-G For E-10 & all Gasoline Blends!

 #1 In preserving and restoring fuel freshness

Your boat or RV sits. The fuel goes bad. And you're facing major expenses getting things back in shape. Protect your treasured investment and your pocketbook against the costly effects of fuel system gum and varnish. Protect with PRI-G - PROVEN the most effective stability treatment available to consumers today!

The fact remains that Independent laboratory tests confirm no other product is as effective as PRI-G in preserving new fuel and restoring old fuel to refinery freshness. That's because refinery-grade PRI-G is an industrial concentrate - much stronger and far more effective that "consumer" brands. In fact, PRI-G contains the very same PRI chemistry used by commercial industry for maximum fuel preservation. If you want only the very best protection for your boat or RV, - settle for nothing less than PRI-G!

Prevents carbon deposits:

Carbon removal or flush "additives" are after-the-fact products that pose the risk of engine damage should a chunk of carbon dislodge and get stuck in the wrong place! Unlike these, economical PRI-G prevents the problem from ever happening in the first place!  If PRI can do it on the world's largest ship engines with tar-like "bunker" fuel, just think how PRI can protect your engine and save you from unexpected breakdowns and costly repairs! Don't give damaging carbon a chance to ever build up in your engine. Treat your tank with PRI-G!

Increases power & performance

Engine running rough at idle and doggy on the take-off? No doubt your engine is choking on fuel system deposits and gas that's been rotting in your tank the last several weeks. While we can't promise you'll catch big fish, or keep the rain away as you head up the highway, you'll feel power and smoothness like you never have before. Whether over rough seas or up high mountains, PRI-G will provide power and acceleration when you most need it! Go with PRI-G!

32 oz. treats 512 gallons
16 oz. treats 256 gallons

PRI-D For All Diesel Engines

 Preserves & restores fuel freshness like no other

Today's diesel fuels can go bad fast - faster than you think. Your engine smokes more - your fuel systems foul up - power and performance taper off and sometimes your engine just quits. Don't get caught dead in the water or stopped on the roadside. Give your fuel maximum freshness and performance with PRI-D!

Independent laboratory tests confirm no other product is nearly as effective as PRI-D in preserving new fuel and restoring old fuel to refinery freshness. That's because refinery-grade PRI-D is an industrial concentrate - much stronger and far more effective that "consumer" brands. In fact, public utilities, hospitals and municipalities depend on the same PRI-D strength to keep stand-by generators running when emergencies hit. If you want only the very best protection for your boat or RV, settle for nothing less than PRI-D!

Prevents carbon deposits

Nothing wreaks more havoc on a diesel engine than abrasive hard carbon deposits. PRI-D literally prevents hard deposits, dramatically reducing liner, piston, ring, valve and turbocharger wear (see our videos) . Too good to be true? Just ask the chief engineers aboard the ships we service or the maintenance managers of our onshore fleets. Take a look at our piston comparison photos. PRI-D's enhanced thermal stability chemistry will keep your engine running longer and farther than you ever dreamed! Treat every tank with PRI-D!

Stops soot build-up

Soot blackening your beautiful transom or new RV? Proud boat and RV owners love PRI-D for keeping things shipshape. That's because PRI-D reduces diesel smoke up to 60 percent - the source of the problem. Your equipment will look better, you'll breathe easier, and have more time for the things you love doing. Insist only on PRI-D - the professional's choice!

Eliminates tank slime & sludge from algae

Tired of constantly changing those expensive spin-on filters because of algae slime? While biocides like our own PRI-OCIDE are effective in killing algae, they don't eliminate the slime produced by decomposing micro-organisms. In fact, algae slime sinks to the bottom of your tank, building up a layer of muck that can choke filters and leave you stopped dead when you hit rough seas or bumpy roads.

It is important to note that biocides are not fuel stabilizers. They do nothing to preserve fuel stability. Hence, it is recommended as part of a good fuel storage practice to use a combination of an EPA registered biocide and EPA registered fuel stabilizer. PRI-D and PRI-OCIDE are designed to work together to provide maximum fuel reliability.

That's why you need PRI-D! Only PRI-D dissolves the nasty slime and sludge that results from algae infestation. PRI-D also preserves your fuel to maximum freshness - actually eliminating the conditons that cause algae growth. Eliminate expensive fuel polishing and tank cleanings. Don't let your tank be a bacteria graveyard! Supplement your PRI-OCIDE treatment with PRI-D for every fueling!

32 oz. treats 512 gallons
16 oz. treats 256 gallons