V-LUBE Valve Saver – Tested quality for your engine

In contrast to petrol-powered engines, gas is fed into the combustion chamber without additives. The protective function of additives contained in petrol is not provided. This leads to greater stress on the valves and valve seats.

Additional valve protection is particularly important for gas-powered vehicles!

V-LUBE Valve Saver forms a protective film that minimises stress on the valves and valve seats. Active ingredient particles are released during combustion of the V-LUBE Valve Saver and transported to the valves and valve seats with the exhaust gas flow.

The surface of the valves and valve seats is coated by the V-LUBE active ingredient particles in the thermal environment of the exhaust gas flow (1400-2000 °C). The wear behaviour of the valves and valve seats is thus reduced to a minimum and is below the usual wear tolerances in petrol operation.

V-LUBE Valve Saver also has a cleaning and lubricating active ingredient component that allows V-LUBE Valve Saver to be added directly to the gas line via the V-LUBE Electronic Valve Saver Kit. This removes residues and contamination from injectors and gas lines (not to be used with „platelet injectors“).

V-LUBE Valve Saver is compatible with all commercially available dosing systems.

The additive is added via a dosing system (lubrication kit) at a ratio of 1:1000 (10 ml to 10 litres of fuel).

One litre of V-LUBE Valve Saver thus protects the engine for approx. 10,000 km, depending on the vehicle-specific fuel consumption!

Efficient valve protection with V-LUBE – All details at a glance

Protects valves and valve seats from increased stress
Cleans the nozzles and fuel lines
Increases the economy and service life of the engine
Provides optimum protection with the correct dosage
Is compatible with the dosing systems available on the market
Approved for injector additives (except „platelet injectors“) – the additive is dosed into the fuel line of the gas system and distributed via the injectors
Long-life effect – lasting effect of the additive if dosing does not take place (up to 1,000 km)
No negative effects on the catalytic converter
Reduces maintenance intensity of petrol-powered engines (added to the tank)

V-LUBE quality promise – Because your engine deserves the best

Controlled quality

We subject our V-LUBE Valve Saver to regular, independent quality controls by TÜV Nord for sustainable quality assurance. So you can be sure that you are always using consistently high quality to protect your engine.

Reliable protection

We provide the responsible LPG/natural gas driver with a reliable product that backs up its effectiveness with facts and not with advertising promises. The effectiveness and reliable protection of the V-LUBE Valve Saver has been confirmed in several independent effectiveness and long-term tests with outstanding results.

Sustainability

We are the only manufacturer to have had the long-term effects of V-LUBE Valve Saver on the vehicle’s sensitive catalytic converter tested and can confirm that the high-quality substances in V-LUBE Valve Saver have no negative impact on the effectiveness and service life of the catalytic converter.

Transparency

All quality controls and efficacy studies are available to download online at www.v-lube.de and fully confirm the quality features we have emphasised.

Test procedure

We have commissioned numerous studies and efficacy tests for the V-LUBE Valve Saver since its market launch in 2009 in order to obtain independent confirmation of its efficacy and quality. A brief summary of the results can be found in the following sections.

Result: We have subjected the V-LUBE Valve Saver to rigorous testing and research to ensure the best possible valve protection for you.

Annual inspection

TÜV inspects our product annually to ensure that the high quality remains unchanged.

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Study 1 on effectiveness

Engine test rig test confirms valve protection in the high rpm load range without dosing system.

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Study 2 on effectiveness

The practical driving test confirms the effectiveness of the additive in driving mode without a dosing system.

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Study 3 on effectiveness

The 105,000 km long-term driving test under real-life conditions successfully confirms the effectiveness in the long-term test with dosing system.

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Study 4 on sustainability

126,000km long-term effect on the catalytic converter – long-term use of V-LUBE has no negative effects on the catalytic converter.

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Summary of all tests

Annual quality control (carried out by TÜV Nord)

TÜV Nord checks the V-LUBE Valve Saver for consistent quality at regular intervals. The quality controls were carried out for the first time when the product was launched on the market and are intended to ensure that the quality of the product has remained unchanged and that the same V-LUBE Valve Saver has been used in all subsequent long-term and efficacy tests as is still sold today.

Reliable protection through multiple independently confirmed efficacy

In the first studies (Studies 1 and 2), the focus was on testing the efficacy of the V-LUBE Valve Saver active ingredient without a dosing system. In the long-term practical trial (Study 3), the V-LUBE Valve Saver Kit was used to test the dosage under realistic conditions.

Efficacy study 1

Extract from the test report on the effectiveness of the additive active ingredient on the engine test bench. Carried out at the Saarland University of Applied Sciences.

Procedure: Various operating points were approached on the engine test bench and checked for wear rates in unadditivised operation. In order to test the effectiveness of the additive, the operating point with the highest wear was to be simulated using LPG with additives.

Figure 1: Measured valve clearance at 20h with additive compared to the previously determined wear rate.

Conclusion: Within the scope of the measurement accuracy, it can be stated that no significant wear could occur in the 20 hours. The wear protection appears to start immediately and the effectiveness is given at the dosage used. Furthermore, it is assumed that the protective layer built up by the additive continues to provide protection for a certain period of time even after the additive has been discontinued. However, the holding time of this protective layer was not determined. A 2.0 Mazda engine was used in the study, which is often also used in various Ford models and is not considered gas-resistant.

Effectiveness study 2

Extract from the driving test to analyse valve wear on a Peugeot 107 in LPG operation, additivated with the V-LUBE active ingredient. Carried out at the Saarland University of Applied Sciences.

Procedure: A Peugeot 107 with a liquid-phase autogas system was used for a 10,000 km practical test of the fuel additive. The vehicle has a 3-cylinder Toyota engine, which is not gas-proof. The vehicle was first driven without protective additives and the valve clearance was checked at a mileage of 12,500 km.

In the vehicle used, the geometric compression ratio was increased from 10.5:1 to 12:1 in connection with an optimisation measure for LPG operation. Due to this measure, increased valve wear is to be expected compared to the determined reference value. The first check of the valve clearance at 5,851 km already showed that the use of the additive stopped the valve impact on the exhaust valves. Slight deviations in the valve clearances were present in the range of 10 μm, but averaged 0 μm. The expected valve wear without additive would be 33.9 μm for 6,000 km after the observed initial wear and could be reliably recognised with the measuring equipment used.

During the second, final check of the valve clearance at 10,347 km, an average valve deflection of 0.008 μm + 2 μm/1,000 km was measured over the entire test distance, which confirmed the effective valve protection of the fuel additive used as part of the practical testing carried out.

Figure 2: Averaged value (valve wear [μm/1000km])

Conclusion: To summarise, it can be said that no wear could be detected on any of the valves that reached the magnitude of unadjusted operation.

Effectiveness study 3

Extract from the long-term road test on valve wear in LPG operation, wear analysis on a Toyota Corolla Verso and testing of the V-LUBE Valve Saver Kit. Carried out at the Saarland University of Applied Sciences.

Procedure: In a Toyota Corolla Verso test vehicle, an alternative fuel system was retrofitted to enable operation with liquefied petroleum gas. A vaporiser system with an additive dosing system from the company V-LUBE was installed.

A 1.8 litre petrol engine from the VVT-i series is used in the vehicle. This engine is particularly suitable for this study, as no particular weaknesses in valve operation are known in petrol operation, but gas operation leads to valve impact.

In order to evaluate the wear behaviour in gas operation, approx. 5,000 km were driven in pure gas operation and the valve wear was determined by changing the valve clearance.

In order to evaluate the reduction in wear caused by the additive system, 10,000 kilometres were driven with different settings. The wear was also recorded here via the change in valve clearance.

The following graph shows the valve lash progression on intake and exhaust valves. The first column shows the wear during the unadjusted reference measurement, and the two other columns show the wear rate of the tested dosages. For this reference measurement, 4,554 km were driven, and the average wear on the exhaust valves was 30 μm. In mathematical terms, this results in a value of 6.6 μm per 1,000 km.

Up to test kilometre 12,000, approximately half the dosage of the manufacturer’s recommendation was used before the dosage was increased to the manufacturer’s specification after test kilometre 12,000.

Figure 3: Wear rate after dosage

If the wear rates at the outlet of the first two test phases are now compared, a significant effect on the outlet valves can be seen, which corresponds to a reduction in wear of approx. 1/3 and would therefore approximately triple the service life of the valves.

At full dosing, no wear was detectable within the measurement accuracy.

Figure 4: Wear rate after dosing

Conclusion: Long-term verification after 105,000 km. This result clearly shows that the use of V-LUBE has significantly reduced wear. In unadditivated LPG operation, the vehicle would probably have failed at test kilometre 20,000 due to loss of compression.

As Figure 4 shows, there is no evidence of wear when dosing according to the manufacturer’s specifications, although the vehicle also shows wear in petrol operation. According to the vehicle manufacturer, the valve clearance should be checked every 60,000 kilometres.

It can therefore be stated that the correctly dosed valve protection extends the service life of the valves sufficiently so that they last the full life of the vehicle.

Study 4 Catalyser test

Study report on the scientific evaluation of catalytic converter ageing on a long-term test vehicle with the wear protection additive V-LUBE Valve Saver. Carried out at the Saarland University of Applied Sciences.

In Study 4, the effects of long-term use of V-LUBE Valve Saver on the catalytic converter were to be investigated. Recurring reports of catalytic converter damage when using valve protection additives prompted us to investigate the effects of V-LUBE Valve Saver after long-term use – with positive results.

Procedure: As part of the commissioned study, the Automotive Powertrain Institute of the Saarland University of Applied Sciences analysed a vehicle converted to LPG / liquefied petroleum gas. LPG generally causes higher loads on the charge exchange valves. The vehicle under investigation, a Toyota Corolla Verso 1.8 VVT-i (94 kW/129 hp), was operated in a long-term driving test with an additive to increase the stability of the valves (V-LUBE Valve Saver) using LPG as fuel, and a significant reduction in wear could be demonstrated at this point.

Now the functionality of the catalytic converter is to be tested in order to be able to assess the negative influences of the additive on its service life.

At the time of the test, the vehicle had reached a mileage of 148,000 km, of which 126,000 km had been run on LPG and the valve protection additive „V-LUBE Valve Saver“.

Conclusion: The measurement results of the catalytic converter test from the exhaust gas measurements prove that the long-distance use of the V-LUBE Valve Saver additive over 126,000 km did not have a negative effect on the function of the catalytic converter.

The determined conversion rates are positive and show that the catalytic converter of the test vehicle is still functional even after a long-term test.

No malfunction of the catalytic converter could be detected in this test. In view of the high mileage of the test vehicle in particular, no negative effects of the V-LUBE Valve Saver wear protection additive used on the exhaust gas aftertreatment system could be detected.