Question: Who Makes The Best Gear Oil?

Is 75w90 better than 80w90?

It is less expensive to manufacture though.

If you have differential whine that is quieted by a thicker fluid, then 80W-90 might be a good option.

It will certainly be thicker than 75W-90 for most owners’ operating conditions in moderate climates..

Should I use synthetic gear oil?

However, if the environment is more severe, the temperature runs extremely high or low, there are extended oil drains, or the impact of a failure is considerable enough to justify the cost, then you should choose a synthetic oil.

Who makes STP gear oil?

Energizer HoldingsSTP is an American brand and trade name for automotive aftermarket products, especially lubricants such as motor oil and motor oil additives. The name began as an abbreviation of Scientifically Treated Petroleum. The brand is owned by Energizer Holdings, which acquired STP in November 2018.

Is STP a good oil brand?

1. STP PRO Formula Conventional Motor Oil. Another great motor oil for gasoline engines comes from STP- which stands for “Scientifically Treated Protection”. The brand has made great lengths in producing a formula that controls sludge, and cleans whilst protecting your engine against corrosion or rust.

Can you use STP with synthetic oil?

Use STP® Synthetic Oil Treatment for petrol and diesel engines at or between oil changes. Add entire contents to engine oil when engine is warm.

Can I use 80w90 instead of 75w140?

Either one is fine. Generally the synthetic 75w-140 is for HD applications such as towing, but it will work fine in any application. The synthetic is more expensive as you likely already know.

Can I use 75w90 instead of 75w140?

I think you’ve got your numbers backwards the 75W140 is the heavier (140 vs 90) and for more severe service. It is recommended only for the rear diff and only for heavy towing and continuous use. You shouldn’t go heavier than 75W90 in the front and for normal duty and occasional towing 75W90 is fine for the rear.

Can I use SAE 90 instead of 75w90?

SAE 90 is a very large scale. 80W-90 is the low end of the scale, while 85W-90 is the high end of the scale. Both are single grade SAE 90 oils. SAE 75W-90, is more appropriate in most climates where 90 is specified, specially if it is a transmission.

How long does synthetic gear oil last?

Another benefit of synthetic oils is that the range between oil changes can be extended (up to 30,000 miles for severe-duty applications, and 50,000 miles if the truck isn’t used for off-roading or towing).

Which gear oil is thicker 80w 90 or 85w 140?

80w-90 front, 75w-140 rear. Rear gets more of a workout so more heat. This equates to thicker lubricant.

Is Thicker gear oil better?

As a general rule high viscosity oils are best for low speed, loaded gears with a rough surface. Higher viscosity provides a thicker film, higher wear resistance, and less deformation of the gears as time goes on. Low viscosity oils, on the other hand, are best for high speed systems with lower load.

Is synthetic gear oil better than regular gear oil?

Synthetic lubricants have a lower friction coefficient in a gearbox, better film strength and a better relationship between viscosity and temperature (viscosity index, VI). This indicates synthetic lubricants can be used at lower viscosity grades and lower temperatures.

Can I use 80w 90 instead of 75w90?

A 80W-90 GL-5 passes the same high-temperature specs as a 75W-90 GL-5, so it would be okay to use in a warmer climate. It will be quite a bit thicker than a 75W-90 until it warms up though, so fuel economy will suffer.

Can oil additives hurt my engine?

Generally speaking, the longer oil is used, the more additives will be lost. Over time, using motor oil that lacks important additives can cause increased wear and tear on your engine. It may result in poor fuel economy, rust and corrosion, oil sludge, overheating, breakdowns and other serious engine damage.

Can I mix grease with gear oil?

For example, gear oil may include a sulfur-phosphorus extreme-pressure (EP) additive. … A grease’s thickener is made first, and then oil is added to achieve the desired grade. Therefore, mixing oil and grease will change the ratio of the base oil to the thickener, resulting in a lower consistency grade.

How do I choose a lubricating oil for my gearbox?

Gear Oil Selection CriteriaViscosity – Often referred to as the most important property of a lubricating oil.Additives – The additive package used in the lubricant will determine the lubricant’s general category and affects various key performance properties under operating conditions.More items…

Is it OK to use 75w90 instead of 75w85?

Our answer: Yes, 75W-85 gear oil can most definitely be replaced by 75W-90. In fact, we know that some GM dealers will use 75W-90 gear lube in applications where Chevrolet/Buick/GMC/Cadillac suggests 75W-85.

What is the difference between 75 90 and 75w 140 gear oil?

A 75W-90 will be thinner at higher oil temperatures than a 75W-140. Both are the same thickness at lower oil temperatures. The 75W-140 is said to have a wider viscosity range – when more accurately it would be a wider temperature range.

Can you mix synthetic and regular gear oil?

The simple answer: Yes. There is no danger mixing synthetic and conventional motor oil; however, conventional oil will detract from the superior performance of synthetic oil and reduce its benefits. So, yes, you can safely mix synthetic and conventional oil.

What is 80w90 gear oil used for?

Gear Oil 80W-90 is designed for use in differentials, both hypoid and limited slip, manual gearboxes, transfer cases and transaxles in passenger cars, light commercials, 4WDs, trucks, construction, earthmoving and agricultural equipment, where this viscosity grade is required.

What is the thickest gear oil you can buy?

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.