Quick Answer: Can I Use SAE 90 Instead Of 75w90?

Is SAE 80 the same as 80w 90?

For many climates, the SAE 80W-90 is a good viscosity for the Corvair, but as you saw in the viscosity graphs, it is much more viscous than the original recommendation of SAE 80..

What does SAE 75w 90 mean?

Gear oils with 75W remain flowable up to -40°C. The number “90” refers to the kinematic viscosity of the gear oil at 100 °C. The oil is not viscous. This comprises a range of 13.5 – 18.4 mm²/s. The oil has a high shear stability and can withstand high loads in the gearbox.

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.

What is the best 75w90 gear oil?

Best Sellers in Gear Oils#1. … Valvoline SynPower SAE 75W-140 Full Synthetic Gear Oil 1 GA. … Lucas Oil 14.5 Ounce 10301 Heavy Duty Grease, 14.5 oz,Green. … Polaris Premium Synthetic AGL Plus Gear Lube 32 oz / 946 ml. … Lucas Oil LUC10043 Oil SAE 80W-90 Heavy Duty Gear Oil – 1 Quart.More items…

Can you mix gear oil weights?

You can mix them, but you will likely end up with a 90 weight oil. For example, if you mixed 1 gallon of automatic transmission fluid (ATF) with 300 gallons of gear oil from the same mineral group, the dilution would hardly be noticeable. …

What is 80w90 gear oil used for?

The oil known as 80W-90 GL-5 is a lubricant for the gears in your vehicle. It is used in automatic and manual transmissions, and assists the gears in shifting smoothly.

Is Thicker gear oil better?

When it comes to lubricants, especially for axles, the stance among fleet owners and operators has traditionally been that thicker viscosity is better. After all, thick lubricants do protect. Gear oil must protect critical hardware within the axle while operating in extremely demanding conditions.

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.

Can you use 80w90 instead of SAE 90?

Re: Does SAE 90 = 80W90? 80W90 means the oil flows like a 80 weight oil cold, yet lubricates like a 90 weight oil when hot as defined by the SAE test procedure. Use it when SAE 90 is specified.

What is the difference between SAE 90 and 80w90?

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.

Is synthetic gear oil better?

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.

What weight is ISO 320 gear oil?

The highest SAE crankcase oil grade is 60, which is equal to ISO VG grade 320. ISO grade 46 is equivalent to SAE gear lube grade 75W. ISO viscosity grade 68 is equivalent to SAE 20. ISO grade 220 is equal to SAE gear lube 90.

Is 80w90 the same as 75w90?

75w90 is synthetic where 80w90 is petroleum. Motor oil mad man was referring to off the shelf stuff, and he would be correct. Most 80-w90 is dino or blend.

What is the thickest gear oil you can buy?

The SAE grading system indicates oil viscosity in simple numbers ranging from the thin oil (10) to the very thick oil (140 or above). Heavier weight, or higher grade oil is more viscous and therefore thicker as it flows between the gears. Light grade oil is ideal for small, fast, polished gears under a light load.

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.

Which gear oil is the best?

The Best Gear LubricantsMobil 1 Synthetic Gear Lube LS. Thanks in part to synthetic base oils, Mobil 1 Synthetic Gear Lube LS is stable across a wide range of temperatures. … Red Line MT-90. … Royal Purple Max Gear. … Lucas Synthetic Gear Oil. … Valvoline SynPower Full Synthetic Gear Oil. … Castrol Syntrax Limited Slip.