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Frequently Asked Questions


What is the role of the GONHER oil filter?

Oil filters for GONHER are designed with the sole purpose of catching those particles of pollutants contained in the oil, which could damage the engine parts, that is why its presence in the lubrication system, which separates and retains these pollutants is essential.

When a filter is deformed or inflated, is it considered a defect from the factory?

When a filter is deformed or inflated, it tells us that it was subjected to a pressure above 200 psi, which out of the ordinary. A domed filter is not a defect from the factory, Rather, is a defect of the pressure regulating valve.

What is the purpose of a GONHER air filter?

Engines must suck air freely for proper operation and full power. The GONHER air filter traps hazardous pollutants. The most common pollutants are: dust, soot from the exhaust, plant material and insects.

What is the importance of relief valve in a GONHER filter?

The purpose of the relief valve or bypass is to allow the passage of un-filtered oil, once saturated or clogged the filter media, avoiding that the engine works without oil. This is why it is important to periodically change the filter in our units.


Which API classification should I use in my car?

For gasoline engines, the latest API classification includes the performance properties of each previous classification. If the owner's manual recommend an oil API SL or SM, you can use an API SN oil and it will provides full protection. For diesel engines, usually, the most recent classification (but not always) includes the performance properties of a previous category.

Which viscosity should I choose for my car?

The viscosity depends of many factors including: the condition of the engine, the way of driving, but specially the weather in which it works. Thus, we can summarize the low viscosities (5W, 10W) for cold climates, intermediate viscosities (20W) for temperate and high viscosities (30W, 40, 50) for warm climates or long trips. In any case, we recommend you to check your owner's manual for the viscosity range that can be used in the engine.

When should I change the brake fluid from my car?

The brake fluid should be changed once it becomes dark or cloudy, or each year and remember to keep out of reach of children.

What protection does the GONHER antifreeze / coolant give to my car?

Maximum protection at low and high temperatures. Protection against rust and corrosion. Excellent protection of hoses, oilcloths, seals; as well as bronze, copper, iron and aluminum (elements which make up an engine).


What does it mean when the battery is sulfated?

Disconnecting the batteries of the vehicle for prolonged times or inactivity of the internal combustion engine, causes the formation of sulphate crystals inside the battery, this transforms the material assets of the plates, eliminating part of the volume set of electrical energy, thereby reducing the capacity of the battery.

What do I need to understand when the battery is exhausted?

The life of a battery runs out once its active materials and of electrochemical reaction have completed their lifespan. The active materials are of mineral origin that through course of its use, lose power, thereby ceasing to operate efficiently.

Is there a telephone for questions or clarifications concerning GONHER batteries?

In the United States, the Toll Free Number for technical assistance and general information is 1-888-528-0625.

Is the battery plate number very important?

The Cold Cranking Amps (CCA) and the Reserve Capacity (minutes) are the most important indicators in a battery. The battery’s performance is determined by factors such as; the alloy of its components, purity of the electrolyte, plate thickness, size of plates, plate number, grid structure, composition of the active material, amongst other things.

Why does the battery fail during winter?

With low temperatures, the density of the electrolyte is affected, consequently increasing the power resistance, thus reducing the battery’s capacity.

If a battery is installed with a higher amperage than the one required for the car, will it damage the electrical system?

Installing a battery with a higher amperage will not damage your car because your car will only require the amperage necessary for it to run, from the battery. However, it is important not to confuse amperage with voltage, a different voltage required from car to car will damage the system.

Does GONHER sell batteries through home delivery?

For the moment, this service it is only available in Mexico.

Do all Gonher batteries include Road Assistance Service?

For the moment, this service it is only available in Mexico.

Brake Pads

Why do brakes make noise?

The vibrations, in the parts that make up the brake often manifest themselves with a screech. The brake system is composed of many parts and each one needs its own type of attention, such as; the caliper, piston, rotor, brake pads, brake lines, etc.

Why do brake pads crystallize?

Excessive overheating is the main cause for crystals to form in the brake pads, since it causes the resin to flow into the friction surface, forming a layer between the brake pad and disk, dramatically decreasing braking capacity. This is common when the use of brakes has gone too far in steep slopes and the motor brake is not used, or when the load capacity of the vehicle is surpassed.

What is the friction coefficient and how does it work?

The friction coefficient is a value directly related to the capacity of braking in the brakes. These values are divided in ranges and each range is assigned a letter (E=0.25 a 0.35, F=0.35 a 0.45, G=0.45 a 0.55). The friction coefficient of a braking pad is expressed by two letters, the first represents the braking coefficient in cold and the latter in warmth. The ideal classification for a home car is FF and for professional race cars FG.