what type of oil should i use for my 81 monte carlo
Welcome to the Monte Carlo Family
What engine do you have in your 81 Monte Carlo ?
What model do you have ? How many miles on your engine ?
Any modifications to your engine ? Is it the original engine ?
What engine do you have in your 81 Monte Carlo ?
What model do you have ? How many miles on your engine ?
Any modifications to your engine ? Is it the original engine ?
Engine offerings were carried over, including the standard 229 CID Chevrolet V6 (231 CID Buick V6 in California) an optional 267 CID V8 (not available in California), a 305 CID V8 in the base and Landau models, and a turbocharged 170 hp (130 kW) 231 CID Buick V6 in the Monte Carlo Turbo. There were a total of 3,027 Monte Carlo Turbos for 1981

Thanks for you reply & information. WoW, that's low miles for a 81 Monte
Who are the many that have told you that you were using the wrong weight/type oil ?
What do they say that you should be using. ? Have you had any problems or issues with your Engine ? Is it using any oil ?
How often have you been changing your oil & filter ? Do you live in a State with freezing temp's, or in a southern state with hot temps ?
I would use what the manufacturer recommends. It should be in your manual or on the oil cap. If not, I would contact your Chevy Dealer to confirm.
Below is some information that may help & I hope that our member's chime in and post their thoughts.
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Choosing the Right Engine Oil
By Joe Bruzek, Cars.com

Many owner's manuals explain which conditions are best for different motor oil viscosities.
If you want to own and properly maintain a vehicle, at some point you'll have to figure out what kind of oil your car takes. Whether you're at a service center being asked what kind of oil you want or at a parts store shopping for oil to top off the engine, you'll want to know what's recommended.
The owner's manual gives all the information necessary to put the right viscosity oil — 10W-30, 5W-30, etc. — into your car. Most will have a temperature chart showing which conditions are best for different viscosities. It's also common to see the recommended oil printed on the oil cap under the hood.
It's also important to use oil that meets the automaker's standards, which commonly includes oil with an American Petroleum Institute certification. API-certified oil will have the organization's "starburst" logo printed on the oil container, signifying the oil meets the most up-to-date oil-performance standards.
What Do All Those Numbers Mean?

Make sure the new oil meets the manufacturer's recommendations.
The seemingly cryptic 5W-30 and 10W-30 designations represent the viscosity, or thickness, of engine oil. Which thickness of oil works best in your engine is determined by the automaker. Some common viscosities used in modern cars are 5W-30, 10W-30, 5W-20, 0W-30 and 5W-40.
The numbers represent oil thickness as measured by the Society of Automotive Engineers during hot and cold testing. For 10W-30, the first number (10) is the oil's viscosity when cold; 10 weight is thinner than 30 weight and beneficial when cold, because thinner engine oil allows easy start-up and less strain on the engine. The second number (30) is the oil's viscosity when warm and is typically a heavier oil, to provide better protection at higher temperatures.
The "W" paired with the first viscosity (10W) designates an oil that is certified by SAE for low-temperature use in winter.
Last edited by Space; Dec 10, 2014 at 01:16 PM.
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