Gas Engine Oil
Low-ash gas engine oil formulated for CNG, LNG, and LPG engines - catalyst-compatible technology for cleaner, longer-running operations.
A Cleaner Fuel Creates Different Problems
It is tempting to assume that because gaseous fuels burn cleanly, they are easier on an engine's oil. The opposite is closer to the truth — they are simply harder on it in different ways, and the protections built into a diesel oil are the wrong ones.
Gas engines run hotter and leaner, which drives oxidation and nitration: reactions that thicken the oil and lay down varnish. Because the fuel leaves almost no residue in the combustion chamber, there is nothing cushioning the exhaust valve against its seat, so the valve steadily recedes into it and compression falls away. And with very little sulphur in the fuel, the heavy alkaline additive load a diesel oil carries has nothing useful to neutralise — it simply leaves ash on spark plugs and valves, causing misfires and pre-ignition, and poisoning the catalytic converter.
Bloom Max gas engine oil is formulated for those conditions rather than adapted from diesel: low ash below 0.5%, a TBN of 6 to 8 matched to low-sulphur gaseous fuel, dedicated anti-wear chemistry for valve and seat protection, and nitration and oxidation resistance to hold viscosity across the drain interval. Rated API CF and Caterpillar ECF-3, in 15W-40 and SAE 40.
Purpose-Built for Gas.
Gas-Specific Formulation
Engineered exclusively for natural gas, CNG, LNG, and LPG engines - not a repurposed diesel oil.
High-Temperature Stability
Gas engines run hotter than diesel. Our formula resists oxidation and thermal breakdown at sustained high temps.
Valve Recession Protection
Advanced anti-wear additives protect exhaust valves and seats from accelerated wear unique to gas engines.
Nitration Resistance
Controls nitration by-products that cause oil thickening, keeping viscosity stable throughout the drain interval.
The Gas Engine Advantage.
Low Ash Technology
Minimizes deposit formation on spark plugs, valves, and combustion chambers for reliable ignition.
Extended Drain Capability
Robust oxidation stability enables longer oil change intervals - reducing maintenance costs for fleet operators.
Catalyst Compatible
Formulated to protect three-way catalytic converters and exhaust after-treatment systems from poisoning.
Superior Detergency
Powerful detergent-dispersant system keeps engine internals clean even under continuous heavy-duty operation.
Technical Details.
Engineered For.
Fleet Transition to Gas?
Our team can recommend the right grade and supply plan for your CNG/LNG fleet conversion.
Get in Touch →Gas Engine Oil vs Diesel Oil.
Running diesel oil in a gas engine is one of the most common and expensive maintenance errors in converted fleets. These are the differences that matter.
| Consideration | Heavy duty diesel oil | Gas engine oil |
|---|---|---|
| Sulphated ash | Higher, to carry additives | Low, under 0.5% |
| TBN | 10–12, for sulphur acids | 6–8, matched to clean fuel |
| Main threat handled | Soot loading and acid | Nitration and oxidation |
| Valve seat protection | Fuel residue assists | Dedicated anti-wear additives |
| Operating temperature | Lower | Higher, leaner burn |
| Catalyst compatibility | Risk of poisoning | Formulated to protect |
Bi-Fuel and Dual-Fuel Engines
Vehicles switching between petrol and LPG, or diesel and gas, spend enough time on gaseous fuel to suffer the same valve and deposit problems. Bloom Max gas engine oil covers bi-fuel and dual-fuel applications, which is worth specifying at the point of conversion rather than after the first failure.
Stationary Gas Engines
Generator sets, compressors and power plant engines run at sustained load for long hours, which concentrates oxidation and nitration stress. The same low-ash, nitration-resistant formulation applies, and extended drain capability has a direct effect on running cost where the unit rarely stops.
Common Questions
Gas Engine Oil, Answered.
Fuel chemistry, ash, valve recession and nitration — the questions fleet engineers and trade buyers ask most about gas engine lubrication.
Why can't I use diesel oil in a gas engine?
Gas engines run hotter, burn a much cleaner fuel, and rely on spark ignition. Diesel oil carries a high additive and ash load designed to neutralise sulphur acids and suspend soot — neither of which gas combustion produces in quantity. In a gas engine that surplus ash forms deposits on spark plugs, valves and pistons, causing misfires and pre-ignition, and can poison the catalytic converter. Gas engine oil is a different formulation, not a lighter version of the same thing.
Why is the TBN lower than diesel oil, at 6 to 8?
This looks counterintuitive but is deliberate. TBN is an alkaline reserve for neutralising combustion acids, and those acids come largely from sulphur in the fuel. Natural gas, CNG and LPG contain very little sulphur, so a large reserve is not needed. Because that reserve comes from metallic additives that leave ash behind, an unnecessarily high TBN would actively cause deposit and catalyst problems. A TBN of 6 to 8 is matched to the fuel — where a diesel oil's 10 to 12 would be wrong here.
What is valve recession, and why do gas engines suffer from it?
Valve recession is the exhaust valve gradually sinking into its seat as the two wear against each other. Diesel and petrol fuels leave a small amount of residue that acts as a cushion between valve and seat. Gaseous fuels burn so cleanly they leave almost none, so metal contacts metal at high temperature and the valve beds in further with each cycle — eventually losing valve clearance and compression. Gas engine oil uses specific anti-wear additives to protect that interface.
What is nitration, and how does it affect the oil?
Gas engines run hot and lean, which promotes reactions between nitrogen oxides and the oil. The nitration by-products thicken the oil and form varnish and deposits. Thickened oil circulates poorly and raises operating temperature further, accelerating the process. Nitration resistance is what keeps viscosity stable across the drain interval in gas service, and it is rarely a limiting factor in diesel oils.
What does low ash mean and why does it matter here?
Sulphated ash is the residue metallic additives leave after combustion. This oil is formulated below 0.5%. In gas engines, ash deposits build on spark plugs and valves where they cause misfires and pre-ignition, and they poison three-way catalytic converters. Low ash is a functional requirement in gas service rather than an environmental nicety.
Can I distribute Bloom Max gas engine oil in my country?
Yes. Tesla Power USA appoints distributors, wholesalers and importers by territory, with West Africa and East Africa currently prioritised. Demand is strongest where CNG transit fleets, LPG commercial vehicles or gas-fired generator sets are established, and 5 L to 210 L packaging supports workshop and fleet channels alike.
Explore the range
- Bloom Max heavy duty diesel oil
- Bloom Max 5W-40 fully synthetic engine oil
- Truck & bus batteries
- CoolMax engine coolant
Trade buyers can review distributor partnership terms, register a warranty, or contact the regional team.
Fueling the Future of Clean Transport.
Purpose-built protection for the engines driving the transition to cleaner fuels.