I have looked in the Hayes manual and called around to find out what type of fluid goes into the rearend of 1994 v6 3.4L camaro and no one seems to know. I have checked this forum and I cannot find it anywhere. I was going to put 80/90 gear oil, but then why not put the 75/90. I felt the 75/90 would have a better viscosity varible. So, if anyone knows the answer to my question, that would relly help me out. Thanks.

 

Do you have the Owners Manual? That info would be in it. Most likely it would list 80W-90 lube. If it was mine I would install Mobil 1 75W-90 synthetic gear lube. This is what I use in all my vehicles.

 

I sure don't have my owners manual anymore.Thanks for checkin it out for me. I wish I could find the exact weight though. I call the dealer and they say It is most likely 80/90so I guessthats whatIwill use.

 

just a fun fact so you know from now on. The W in 80W90 or 10W30 ect... stands for weather, not weight. Just letting you know. )

 

Does that mean I can't run 5W-30 in the summer!!! The 5W means the viscosity is like a 5 WEIGHT oil when the oil is not at operating temperature,and because of viscosity improver additives, the oil will act as a 30 WEIGHT when at operating temperature. Obviously when the ambient temperature is cold a lighter weight oil is desireable.

 

The W stands for weather plain and simple. Look it up. The 5 and 30 is the variable viscosity (cold and hot). As for using 5W30 in the summer yes you can use it depending on what type of oil is specified for whatever car.

 

i believe you are correct

 

Multi-grade The temperature range the oil is exposed to in most vehicles can be wide, ranging from cold ambient temperatures in the winter before the vehicle is started up to hot operating temperatures when the vehicle is fully warmed up in hot summer weather. A specific oil will have high viscosity when cold and a low viscosity at the engine's operating temperature. The difference in viscosities for any single-grade oil is too large between the extremes of temperature. To bring the difference in viscosities closer together, special polymer additives called viscosity index improvers, or VIs are added to the oil. These additives make the oil a multi-grade motor oil. The idea is to cause the multi-grade oil to have the viscosity of the base number when cold and the viscosity of second number when hot. This enables one type of oil to be generally used all year, and when multi-grades were initially developed, they were frequently described as all-season oil. The viscosity of a multi-grade oil still varies logarithmically with temperature, but the slope representing the change is lessened. This slope representing the change with temperature depends on the nature and amount of the additives to the base oil. The SAE designation for multi-grade oils includes two grade numbers; for example, 10W-30 designates a common multi-grade oil. Historically, the first number associated with the W (again 'W' is for Winter, not Weight) is not rated at any single temperature. The "10W" means that this oil can be pumped by your engine as well as a single-grade SAE 10 oil can be pumped. "5W" can be pumped at a lower temperature than "10W" and "0W" can be pumped at a lower temperature than "5W". The second number, 30, means that the viscosity of this multi-grade oil at 100°C (212°F) operating temperature corresponds to the viscosity of a single-grade 30 oil at same temperature. The governing SAE standard is called SAE J300. This "classic" method of defining the "W" rating has since been replaced with a more technical test where a "cold crank simulator" is used at increasingly lowered temps. A 0W oil is tested at −35°C (−31°F), a 5W at −30°C (−22°F) and a 10W is tested at −25°C (−13°F). The real-world ability of an oil to crank in the cold is diminished soon after put into service. The motor oil grade and viscosity to be used in a given vehicle is specified by the manufacturer of the vehicle (although some modern European cars now make no viscosity requirement), but can vary from country to country when climatic or mpg constraints come into play.



Just do a little research and you can find exactly what you are looking for. The W stands for winter.

 

very well put 6v49der.... yes winter or weather are both acceptable.

 

I would also accept Who cares