Motul 5000 4T is semi-synthetic meanwhile Motul 7100 4T is fully synthetic motor oil specifically designed for 4-stroke motorbike engines. 5000 generally emphasizes proper engine rinsing on the other hand 7100 focus point is to prevent the engine from wear and tear.
5000 possesses zinc-based and phosphorus-based chemicals in a lesser amount which helps it to produce less ash residue thus enhancing catalytic converter efficiency. Excessive amounts of detergents along with dispersants are included in the oil to limit sludge formation.
The high kinematic viscosity at elevated temperatures makes sure its dominant performance during extreme conditions. It also possesses a low pour point temperature for its smooth working during freezing conditions.
A high number of wearing-resistant compounds present in 7100 helps to provide superb resistance against engine deterioration. Engine cleaning additives known as detergents are also added in good numbers to make sure thorough cleaning of the engine. The oil also performs superbly during extremely low temperatures.
A high ignition point of the oil ensures that it does not vaporize sooner. A significant quantity of bases is also introduced into the oil to protect the engine from corrosion issues.
| Details | Motul 5000 4T | Motul 7100 4T |
| Compatibility with Vehicles | Motorbikes | Motorbikes |
| Visual | Amber | Red |
| Engine Type | 4-stroke engines | 4-stroke engines |
| Nature of oil | Semi-synthetic | Entirely synthetic |
| Accessible Viscosities | 15W-50, 10W-40, 10W-30, 20W-50 | 10W-30, 5W-40, 20W-50, 15W-50, 10W-60, 10W-50, 10W-40 |
| API Standards | SL / SJ / SH / SG | SN / SM / SL / SJ / SH / SG |
| JASO Standards | MA2 under N° M033MOT153 | MA2 under N° M033MOT117 |
| Quality | HC-Tech | 100% synthetic |
| Price per 4 liters | 25 to 30 Pound Sterling | 50 to 60 Pound Sterling |
Oil’s Effect on Catalytic Converter Working
In engine oils, some compounds of phosphorus, as well as zinc, are added to reduce the problem of engine wear and tear. These compounds upon oil combustion turned into ash which is toxic in nature. This ash steps inside the catalytic converter and causes it to cease.
The ceasing of the converter results in a decline in its performance. If the oil exhibits these primary wear-restricting compounds in abundant amounts, it would thereby make it less effective in terms of the catalytic converter’s well-ordered working.
5000 oil contains a lesser number of these primary anti-wearing supplements so less amount of ash is formed upon oxidation of the oil. The lower ash formation leads to better and superior catalytic converter working.
Conversely, 7100 because of its higher comprising of wear-reducing compounds ultimately leads to the generation of more ash. Thus, a greater amount of toxic ash plunges into the converter restricting it to function smoothly.
Reducing Engine’s Deterioration
The problem of engine wearing rises when the moving parts continue to interact with each other. This continual movement is restricted by including special supplements into the oil known as anti-wear additives.
The function of these compounds is to construct a thin coating along with these parts which prohibits them to make contact with one another. The oil containing these supplements in significant numbers would give a better safeguard against engine deterioration.
5000 has a lower number of wear-resistive compounds. As a result, the problem of friction is marginally more between engine parts using this oil causing greater engine wear and tear.
Meanwhile, the presence of these wear restricting compounds in 7100 is greater therefore a firm layer is developed against the moving parts. The stronger layer limits their interaction thereby reducing friction as well as engine deterioration.
Limiting Sludge Generation
The contaminations present in oil such as dirt and moisture are extremely dangerous for the engine. The oxygen-enriched oil reacts with these impurities resulting in the generation of a black thick fluid termed sludge. This sludge act as a hurdle to proper streaming of oil inside the engine. For regulation purposes, some additives called detergents are priorly included in the oil.
These chemicals significantly reduce sludge formation. The oil with the majority concentrations of these supplements would prove to be more effective in ceasing the sludge build-up.
The overall concentrations of detergents present in 5000 are slightly higher making it superior to its rival in this regard. The significant quantities of these compounds make sure the proper rinsing of the engine and proper flow of engine oil inside the pipe.
In the case of 7100, the concentration of detergents added falls short when compared to its peer. So, there is a faintly greater problem of sludge build-up in this oil.
Performance Analysis during Hot Conditions
The transfer of momentum between multiple oil layers is known as kinematic viscosity. The oil possessing greater kinematic viscosity would generally perform more dominantly as compared to the reversed case. Moreover, during temperature fluctuations, the oil goes through various changes in its viscosity.
This variation is expressed as the viscosity index. If the oil has a higher viscosity index, there would be lesser alteration in its viscosity.
Both the density and kinematic viscosity of 5000 at specific temperatures are greater than its counterpart. Therefore, this oil performs superiorly when the temperature enhances from 40 to 100 o C. The higher viscosity index further strengthens its dominance as it undergoes minimal changes in its viscosity upon temperature surge.
The lower density, as well as kinematic viscosity of 7100, depicts that the performance of this oil at elevated temperature situations will be behind its peer. Furthermore, its viscosity index is also less than its rival illustrating that oil will go through more viscosity variations on temperature increment.
| Contrasting oils (10W-40) | Oil Density at 20 o C (Kg/m3) | Oil Kinematic Viscosity at 40 o C (mm2/s) | Oil Kinematic Viscosity at 100 o C (mm2/s) | Viscosity Index |
| Motul 5000 4T | 0.870 | 100 | 15.3 | 156 |
| Motul 7100 4T | 0.859 | 88.8 | 13.5 | 154 |
Performance Analysis during Cold Conditions
When it comes to chilly and freezing conditions, oil performance is evaluated by the pour point temperature. It is the least temperature underneath which the oil losses its streaming property.
The oil which has the lowest pour point temperature would perform much more diligently than the opposite case.
The performance of these oils in colder situations is almost similar as both the oils have similar pour point temperatures so they are equally compatible in this regard.
| Contrasting oils (10W-40) | Pour Point Temperature (o C) |
| Motul 5000 4T | -33 |
| Motul 7100 4T | -33 |
Oil Pre-Ignition Comparison
The combustion of oil takes place before reaching its ignition point. This is due to the number of light-weighted molecules present in it. The greater these molecules are in number; the higher will be the volatility of the oil and the sooner it will be evaporated.
5000 has a greater number of these fine particles therefore it is more volatile than its competitor. The molecules available in the abundant figure cause the oil to reach its combustion point sooner than its rival and thus is less effective in terms of safeguarding from pre-ignition.
7100 because of its lower concentrations of these molecules is less volatile so the oil has an ignition point higher than its counterpart. Therefore, this oil provides better shielding against prior burning.
| Contrasting oils (10W-40) | Combustion point (°C) |
| Motul 5000 4T | 226 |
| Motul 7100 4T | 236 |
Exchanging Intervals of oils
The ignition of oil results in the formation of acids which causes engine corrosion. To mitigate this problem, alkaline-based products are introduced into the oil. Their primary purpose is to neutralize these acids and prevent the engine from getting corroded.
TBN is a parameter that is used to estimate the total quantity of bases present in an oil. If the oil has higher TBN it would have lower oil interchanging frequency and therefore gives a longer period of exchange.
5000 possess a lower number of bases which further leads to a lower TBN. So, this oil is needed to be replaced quite frequently as compared to its counterpart and therefore is less economical.
7100, on the other hand, exhibits a higher TBN as an excessive number of alkaline additives are added to it to ensure oil’s longevity. That’s why this oil provides longer intervals of replacement.
| Contrasting Oils (10W-40) | Total Base Number (mg KOH/g) |
| Motul 5000 4T | 7.0 |
| Motul 7100 4T | 8.4 |
Quick Summarization
- 5000 is a synthetic blend meanwhile 7100 is completely synthetic oil.
- The working of catalytic converter using 5000 is better due to the presence of low ash forming constituents.
- 7100 exhibits wear-reducing supplements in an abundant amount leading to better protection in case of engine deterioration.
- 5000 possesses greater quantities of detergents helping it to provide better rinsing of the engine.
- The higher viscosity index of 5000 enables it to resist any kind of change in its viscosity upon temperature increment.
- Both the oils perform equally well in frosty situations because of identical pour point temperatures.
- 7100 provides better shielding from early combustion of oil.
- The frequency of changing of 5000 is greater indicating that it is needed to be replaced at regular intervals compared to its peer.
- The cost of 7100 is very expensive in comparison.