Gulf Western · Part number 300058B · NZ$28372.00 incl. GST
G'day mate! For your hard-working diesel beasts like the Isuzu D-MAX, Mazda BT-50, or even a classic Mitsubishi Delica, a quality diesel fuel additive is an absolute no-brainer for keeping those injectors sparkling clean and the whole fuel system humming, ensuring you get top power and fuel economy, even when you're battling the toughest Kiwi conditions. The Gulf Western diesel additive is a top-notch choice we've got here at CARFIX, right alongside other trusted fuel treatment brands.
NZ$28372.00 including GST. Part number 300058B.
Give Your Diesel a Proper Kiwi Tune-Up with Fuel Additives — Featuring Gulf Western
> Right, so what's the go with diesel fuel additives? Think of 'em as a bit of a magic potion for your Ute or truck. They're specially designed to scrub those injectors clean, stop nasty deposits from building up in your fuel system, and even fend off moisture — all the stuff that can really muck up your engine's performance. If you're running a workhorse like an Isuzu D-MAX, a Mazda BT-50, an LDV V80, or even a big commercial Isuzu Giga, and you're out there on those dusty rural roads or hauling heavy loads across Aotearoa, these additives are your best mate. They fight off the carbon gunk and injector fouling that can totally rob your engine of its grunt and make your wallet a bit lighter at the pump.
Symptoms That Led You Here
• Rough idle or hesitation during acceleration
• Noticeable drop in fuel economy on your usual routes
• Black smoke from exhaust under load
• Hard starting in cold NZ mornings
• Engine knock or diesel clatter that wasn't there before
• Loss of towing power when hauling trailers or boats
• Check engine light with injector-related fault codes
Will it pass WOF?
Fuel additives themselves aren't a WOF inspection item, but the symptoms they address—excessive smoke emissions and poor combustion—can cause your diesel to fail the visible emissions check. Regular additive use helps maintain clean combustion, keeping your Ute or commercial vehicle compliant with NZ WOF standards.
DIY or Workshop?
Difficulty: 1/10 | Time: 2 minutes | Tools: None required
Simply pour the correct dose into your fuel tank before filling with diesel. No mechanical skill needed. The additive mixes with fuel and works through normal driving. Check the bottle for the recommended ratio—typically one treatment per tank or as a periodic maintenance dose.
Expert Recommendation
Bob and the CARFIX team recommend incorporating a quality diesel additive into your maintenance routine, especially if your D-MAX, BT-50, or Delica sees regular short trips, towing duties, or sits idle between uses. Modern common-rail diesel injectors operate at extreme pressures and tolerances—even minor deposits affect spray patterns and combustion efficiency. Bob @ CARFIX is always on hand to help you work out exactly what additive suits your diesel Ute or commercial vehicle. Make sure you head over to Bob's Shop for a chat!
Fitment Notes
• Suitable for all diesel engines including common-rail systems in the Isuzu D-MAX (2019+), Mazda BT-50 TDi (2021+), and LDV V80
• Compatible with older indirect injection diesels like the Mitsubishi Delica/L300 TD and Express models
• Safe for heavy commercial applications including Isuzu Giga trucks
• Works with the Lexus IS 220d's sophisticated diesel system
• Always verify dosage rates for your tank size
• Not a substitute for addressing mechanical injector faults—if symptoms persist after treatment, have injectors professionally tested
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🛠️ Bob's Pro Tip: Do the Job Right!
> If you're replacing this additive, make sure you've got the right workshop prep, protection, and safety gear ready. Taking a bit of extra time and using the proper safety stands and cleaners makes all the difference for a professional result!
🧰 What Else You'll Need:
• Safety First: Always secure your vehicle on heavy-duty safety jack stands before working underneath. Never rely solely on a hydraulic jack.
• Clean Hands: Keep a pack of Nitrile Gloves handy to protect your skin from grease, oils, and chemical sprays.
• Preparation: Have microfibre towels and a suitable parts cleaner nearby to keep components clean during installation.