What does GL-4 mean in gear oil?

GL-4. Active. The designation API GL-4 denotes lubricants intended for axles with spiral bevel gears operating under moderate to severe conditions of speed and load or axles with hypoid (see note)gears operating under moderate speeds and loads.

What is the best gear oil for a manual transmission?

The GL-5 is recommended to high-stressed gearboxes in trucks and high power output cars. The owner’s manual of your car will most definitely tell the right GL rating for the transmission. On checking the manual, you might find MT-1 rating recommendation. MT-1 grade oil is used in non-synchronized type gearbox.

What is the difference between GL-4 and gl5 gear oil?

The main difference between GL-4 and GL-5 gear oils is the amount of EP additives. GL-4 is suitable for hypoid gear service when they are under severe service but are without shock loading. GL-5 is suitable for hypoid gear service under severe service and shock loads and not for use in a gearbox.

What does API stand for in gear oil?

The American Petroleum Institute (API) has a system of specifications for classifying gear and differential oils with a GL (Gear Lubricant) rating.

Is GL5 OK for GL4?

No, the API GL5 rating does not supercede or cover the GL4 rating. It is important to follow the gearbox or diff manufacturers recommendations and use the correct GL rating.

Is it OK to mix synthetic gear oil with regular gear oil?

Mixing. Indeed, some commercially available gear oils are a mixture of synthetic PAO oil and mineral oil in various proportions. This is a clear indication that synthetic and regular mineral gear oils can be mixed.

What’s the difference between 75W90 and 80W90 gear oil?

SAE 75W-90 maintains a more consistent thickness, or viscosity, across a wide temperature range. It’s thicker when exposed to high heat and thinner under colder, wintry conditions than 80W-90. The use of 75W-90 gear oil is recognized by OEMs as a contributor to overall fuel economy.

Can I use GL5 gear oil instead of GL4?

Can I use GL-5 instead of GL4?

Is there a synthetic SAE 75W 90 GL 4?

PENNZOIL® SYNTHETIC SAE 75W-90 GL-4 combines a premium performance gear oil additive package with high quality synthetic base stocks.

How does Mobil synthetic gear oil 75w-90 work?

Mobil Synthetic Gear Oil 75W-90 meets the API GL-5 performance level. Railway gearbox designs have changed and increased the requirements of fluids to deliver higher performance including potentially increased productivity and reduced operating costs.

Is the AMSOIL GL-4 synchro 75W90 a good transmission?

A few years have passed since the debut of the AMSOIL Manual Transmission GL-4. It has really become a top seller. First, there aren’t too many quality GL-4 75W90 (or 80W90) on the market. The synthetic products offered by our competitors eventually cause shift/downshift issues.

Which is Amsoil gear Lube do you use?

AMSOIL Synthetic Manual Transmission and Transaxle Gear Lube (MTG) is designed to meet the special requirements of certain manual transmissions and transaxles as well as those requiring GL-4 performance, such as the New Venture NV4500. Formulated specifically for demanding manual transmission and transaxle applications.