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Useful petrol additives

Ladies and gentlemen, dear customers!

The use of classic vehicles can be simplified by intelligent selection of petrol additives. So you can make use of the achievements of modern chemistry in an adopted form. Here are some suggestions.

Best regards from your SC Parts sales team


ZDD Plus additive

ZDD Plus additive

ZZDP (Zinc-Dialkyl-Dithio-Phosphate) additive to use modern engine oils from specification API SM, for older vehicles. 118 ml is enough for about 4.7 litres to bring modern oils to API-SF ZDDP level.

These wear-protective additives are hardly contained in modern oils from API SJ onwards. This is due to the catalytic converters used in today's vehicles. Classic vehicles without catalytic converter often need a zinc complex as wear protection.


Valvemaster Plus

Lead substitute additive with octane booster for the operation of demanding classic vehicles with lead-free fuel. Not only does it reduce wear on cylinder liners, pistons and valves, it also keeps the fuel system clean. Valvemaster Plus also offers effective corrosion protection and an increase in octane rating. This reduces the risk of the engine ringing.

Valvemaster Plus - fuel additive for use with unleaded fuel and as an octane booster. Dosage 1:1000, enough for 250 litres.

Valvemaster Plus

Bactofin - Petrol stabilizer

Bactofin - Petrol stabilizer

Modern fuels attack metal parts of fuel supply systems. This problem particularly affects older vehicles. Bactofin as a gasoline stabilizer helps. Bactofin also contains an additive that prevents the growth of bacteria in biogenic fuels. Bactofin can also be used as a lead additive. Bottle with 100ml content.

Bactofin in 250ml bottle


All-in-one additive

All-in-one additive

Environmentally friendly manganese-based lead substitute and octane booster for classic vehicles. Protects the tank and fuel system from corrosion, prevents the valves from seizing, increases the octane number of unleaded petrol by up to 2 octane, protects carburetors from freezing and prevents the engine from running on. Very easy handling and dosing, practically for one filling of the tank.


It's incredible: Everything new, everything tight, everything works perfectly. Nevertheless, the cooling circuit is constantly overheating.

Often the finest hairline cracks in the cylinder head are the cause. Everything seems to be okay with a cold engine. When warm, the cracks expand and a small flame ignites into the cooling circuit. A test drive does not reveal such problems. We recommend our lie detector for the detection of CO2 as combustion residue in the cooling water.

Coolant check

Coolant check

Our "small" tester made of plastic in glove box format, for quick diagnosis, also on the road, e.g. when buying a vehicle. The kit contains 35 ml reaction liquid and is therefore sufficient for approx. 17 tests.


Test zum Nachweis von CO2 im Kühlwasser

Combustion gases entering the cooling system through a leak can be detected in 1 minute with a cold or warm engine, even the smallest and sporadically occurring leaks. Precision pipette and indicator liquid (completely non-toxic and harmless) in a solid wooden case, including instructions.

Spare check liquid is available seperatly

Test zum Nachweis von CO2 im Kühlwasser

Jerrycan in black

Jerrycan in black

The 20 ltr standard canister has been in use for over 80 years wherever fuels had to be transported. Today, the canister is manufactured in many plants all over the world. Our model is TÜV GS approved, also for commercial transports, suitable for all types of fuel. Tare weight approx. 4kg

Jerrycan in red

It doesn't always have to be black or green. Fuel resistant baked coating, now available in three colours.

Jerrycan in green

Jerrycan in red

Fuel filler cap Monza

Probably the oldest car accessory still available today. The filler caps have been available with snap locks since 1937. Made of zinc or cast aluminium, either polished or chrome-plated, the filler caps are a delight for any vehicle.

Solid brass colar. Needs to be soldered to the filler neck

Fuel filler cap Monza

Fuel filler cap Aston

Fuel filler cap Aston

The tank caps fit either on the factory thread or on a brass collar to be soldered on. For special applications on large motor sport tanks, there is a connection that is riveted directly onto the tank. The tank caps captivate by their generous diameter, which makes very fast refueling possible and the safe sealing by a rubber seal held in brass plate.

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