Sale EndedSee you in 2027
⚡ The EOFY sale is over for 2026 — but Father's Day deals are just around the corner!
Next Up — Father's Day 2026
Missed the taxman? Don't miss Dad.
Our EOFY sale has wrapped up for 2026, but the savings aren't done. Enter your details below and we'll let you know the moment our Father's Day 2026 deals go live.
Here's what was on offer this EOFY — all our best-selling diesel, petrol, truck & marine treatments. Full-price stock is still available year-round on our website, Aussie-made and satisfaction guaranteed.
Diesel Deals — Ended
Sale Ended
Engine Blowby
Engine Blowby Kit + FREE Cleanpower
EOFY offer closed
Sale Ended
FTC Decarbonizer
FTC Special Offer
EOFY offer closed
Sale Ended
Diesel Value Pack
Flushing Oil Concentrate & CRD Fuel Enhancer Value Pack
EOFY offer closed
Sale Ended
Stop Exhaust Smoke
Engine Stop Smoke Additive Pack — Diesel
EOFY offer closed
Sale Ended
Diesel Value Pack
Ultimate Diesel Pack
EOFY offer closed
Sale Ended
Diesel Additives
Dirty Diesel Kit
EOFY offer closed
Cooling System Deals — Ended
Sale Ended
Cooling & Overheating
RMI-25 Cooling System Treatment — 1 Litre
EOFY offer closed
Sale Ended
Cooling & Overheating
RMI-25 Cooling System Treatment — 5 Litre
EOFY offer closed
Sale Ended
Cooling & Overheating
RMI-25 Cooling System Treatment — 20 Litre
EOFY offer closed
Bulk Deals — Ended
Sale Ended
Bulk Fuel Storage
Premium Diesel Treatment
EOFY offer closed
Sale Ended
Marine Additives
Marine Diesel Fuel Stabilizer
EOFY offer closed
Sale Ended
Bulk Fuel Storage
20L Variant Savings
EOFY offer closed
Petrol Deals — Ended
Sale Ended
Petrol Value Pack
Ultimate Petrol Pack
EOFY offer closed
Sale Ended
Stop Exhaust Smoke
Stop Smoke Pack — Petrol
EOFY offer closed
Sale Ended
Petrol & Diesel
Flushing Oil Concentrate & Cleanpower Value Pack
EOFY offer closed
Sale Ended
Petrol Value Pack
Petrol Performance Pack
EOFY offer closed
More Deals — Ended
Sale Ended
Stop Rust
XTROLL Chassis Guard
EOFY offer closed
Sale Ended
Oil Catch Cans
Directions Plus Catch Can Kits
EOFY offer closed
Sale Ended
Oil Catch Cans
Western Filters Catch Can Kits
EOFY offer closed
Missed the sale?
Give the team at Cost Effective Maintenance a call — we're always happy to sort you out with the right treatment for your vehicle.
📞 (07) 3376 6188 ✉️ [email protected]Free shipping Australia-wide • Next-day dispatch • Satisfaction guaranteed • Aussie-made