Below you will find the best synthetic oil for a 1981 Chevrolet Trucks G20 HD VAN. Maximize your vehicle's potential with 100% full synthetic oil that is made in the USA! For more than the past 50 years, AMSOIL has perfected the art of maximizing efficiency and engine life. The advanced synthetic formulas deliver superior protection from heat, friction, and wear, keeping engines as good as new for miles. Upgrade to AMSOIL today and experience better performance, reliability, and reduced oil consumption. Click add to cart for more details. Sign up as a preferred customer and get discounts and more! The oil type, capacity and oil filter (if available) are listed below and verified for accuracy. Upgrade now!
Recommended oil for my 1981 G20 Hd Van
| Product Name | Product Description | Capacities | Product |
|---|---|---|---|
| Signature Series 10W-30 Synthetic Motor Oil | Get the best synthetic oil for your G20 Hd Van now! Save time and money and protect your Chevrolet Trucks. | With filter 5 quarts After refill check oil level. |
ATMQT-EA
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| XL 10W-30 Synthetic Motor Oil | Protect your G20 Hd Van with Amsoil and support the best MADE in USA oil! | With filter 5 quarts After refill check oil level. |
XLTQT-EA
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| OE 10W-30 Synthetic Motor Oil | AMSOIL OE Synthetic Motor Oil is specially made for the extended oil change intervals recommended for your 1981 Chevrolet Trucks G20 Hd Van 5.7L engine. It has advanced synthetic technology that resists chemical breakdown for maximum wear protection for your vehicle which is well beyond the traditional 3,000-mile oil change interval. Get the best synthetic oil now for your Chevrolet Trucks G20 Hd Van. | With filter 5 quarts After refill check oil level. |
OETQT-EA
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Recommended oil filters for my 1981 G20 Hd Van
| Product Name | Product Description | Product |
|---|---|---|
| AMSOIL Ea Oil Filters | This filter is for your 1981 Chevrolet Trucks G20 Hd Van and is designed to last up to 25k (normal conditions) or 15k miles (severe conditions) or 1 year, whichever comes first. |
EAO24-EA
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| WIX Oil Filter | WIX oil filter change intervals for your 1981 Chevrolet Trucks G20 Hd Van are extended OEM recommendations to match the drain intervals of AMSOIL XL Motor oil. (12,000 miles or 1 year, whichever comes first). |
51061-EA
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Recommended fuel Filters for my 1981 G20 Hd Van
| Product Name | Product Description | Product |
|---|---|---|
| WIX Fuel Filters | Superior fuel cleansing for your 1981 Chevrolet Trucks G20 Hd Van and it will prevent pump wear, injector clogging, premature engine wear while helping boost your G20 Hd Van's fuel economy! |
33052-EA
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| WIX Crankcase Filter | Get this awesome WIX crankcase filter for your 1981 Chevrolet Trucks G20 Hd Van and protect your engine. |
42995-EA
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Recommended transmission fluids for my 1981 G20 Hd Van
| Product Name | Note | Capacities | Product Description | Product |
|---|---|---|---|---|
| SEVERE GEAR® 80W-90 | Manual Transmission Fluid (1) In Canada use 80W. |
3-SPD 3 pints
4-SPD 8 pints |
This lube is made to exceed the requirements of equipment and all vehicles that require SAE 80W-90 viscosity. It is made with synthetic base oils and top additives without adding any wax. Amsoil Severe Gear is solid against thermal breakdown. Will give you awesome protection for bearings and gears and tough against heat which will help extend the life of your equipment and avoid costly repairs. Made in the U.S.A. |
AGLPK-EA
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| SEVERE GEAR® 75W-90 | Manual Transmission Fluid (1) In Canada use 80W. |
3-SPD 3 pints
4-SPD 8 pints |
This special formula is made for harsh operating conditions that pick-up trucks endure. Also top-notch protection for SUVs, heavy equipment, and other heavy-duty vehicles. Made in the USA. |
SVGPK-EA
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| SEVERE GEAR® 75W-110 | Manual Transmission Fluid (1) In Canada use 80W. |
3-SPD 3 pints
4-SPD 8 pints |
This is a fantastic lubricant for towing trailers, heavy duty hauling, off road driving/4x4, commercial applications, and for race enthusiasts. This severe gear lube will protect bearings, gears from friction and exceeds performance of any regular gear oil out there! Keep your truck or vehicle out of the shop and avoid costly repairs with this made in the USA lube. |
SVTPK-EA
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| Signature Series Multi-Vehicle Synthetic Automatic Transmission Fluid | Manual Transmission Fluid |
3-SPD 3 pints
4-SPD 8 pints |
Amsoil's Signature Series Multi-Vehicle Synthetic automatic transmission fluid is made to blow the doors off any regular or conventional ATF fluids on the market and our oil surpasses the performance needs of most vehicles. Protect your transmission and avoid costly repairs. This fluid has an advanced formula to give awesome top-notch protection under harsh operating conditions. Transmission repairs are expensive so protect your vehicle with this great fluid! |
ATFPK-EA
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| OE Multi-Vehicle Synthetic Automatic Transmission Fluid | Manual Transmission Fluid |
3-SPD 3 pints
4-SPD 8 pints |
Outsanding protection and resists varnish! Change interval based on your G20 Hd Van's recommendation. |
OTFQT-EA
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| Torque-Drive® Synthetic Automatic Transmission Fluid | Manual Transmission Fluid |
3-SPD 3 pints
4-SPD 8 pints |
Awesome protection under extreme temperature! Protect heavy-duty transmissions with this made in the USA oil. Follow the service interval in your owner's manual. Protect your Chevrolet Trucks. |
ATD1G-EA
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| Signature Series Fuel-Efficient Synthetic Automatic Transmission Fluid | Automatic Transmission Fluid (1) This specification has been updated from Dexron II or III to Dexron VI per a Technical Service Bulletin from the manufacturer |
3 speed THM400 Total Fill 11 quarts
4.3 quarts Initial Fill
3 speed THM350 Total Fill 10 quarts
3.5 quarts Initial Fill |
If a lighter viscosity is needed then this automatic transmission fluid provides top-notch protection! Recommended for Toyota, Ford, and General Motors transmissions. You will get the same awesome protection as Amsoil's Signature Series Multi-Vehicle automatic transmission fluid. Also recommended for vehicles that need GM DEXRON® VI, Ford MERCON® LV and SP, Honda DW-1, Nissan Matic-S, and Toyota WS fluid specifications. |
ATLPK-EA
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| OE Fuel-Efficient Synthetic Automatic Transmission Fluid | Automatic Transmission Fluid (1) This specification has been updated from Dexron II or III to Dexron VI per a Technical Service Bulletin from the manufacturer |
3 speed THM400 Total Fill 11 quarts
4.3 quarts Initial Fill
3 speed THM350 Total Fill 10 quarts
3.5 quarts Initial Fill |
Outstanding protection and resists varnish! Change interval based on your G20 Hd Van owner's manual. |
OTLQT-EA
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Differential for my Chevrolet Trucks G20 Hd Van
| Product Name | Note | Capacities | Product Description | Product |
|---|---|---|---|---|
| SEVERE GEAR® 80W-90 | (1) Use GM P/N 89021671 which replaces previously recommended GM P/N 1052271. Do not add friction modifier. |
With 10.5 RG Rear 6.3 pints
With 8.5 RG Rear 4.2 pints
With 8.8 RG Rear 3.6 pints
With 9.5 RG Rear 5.5 pints
With 9.75 RG Rear 5.9 pints |
This lube is made to exceed the requirements of equipment and all vehicles that require SAE 80W-90 viscosity. It is made with synthetic base oils and top additives without adding any wax. Amsoil Severe Gear is solid against thermal breakdown. Will give you awesome protection for bearings and gears and tough against heat which will help extend the life of your equipment and avoid costly repairs. Made in the U.S.A. |
AGLPK-EA
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| SEVERE GEAR® 75W-90 | (1) Use GM P/N 89021671 which replaces previously recommended GM P/N 1052271. Do not add friction modifier. |
With 10.5 RG Rear 6.3 pints
With 8.5 RG Rear 4.2 pints
With 8.8 RG Rear 3.6 pints
With 9.5 RG Rear 5.5 pints
With 9.75 RG Rear 5.9 pints |
This special formula is made for harsh operating conditions that pick-up trucks endure. Also top-notch protection for SUVs, heavy equipment, and other heavy-duty vehicles. Made in the USA. |
SVGPK-EA
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| SEVERE GEAR® 75W-110 | (1) Use GM P/N 89021671 which replaces previously recommended GM P/N 1052271. Do not add friction modifier. |
With 10.5 RG Rear 6.3 pints
With 8.5 RG Rear 4.2 pints
With 8.8 RG Rear 3.6 pints
With 9.5 RG Rear 5.5 pints
With 9.75 RG Rear 5.9 pints |
This is a fantastic lubricant for towing trailers, heavy duty hauling, off road driving/4x4, commercial applications, and for race enthusiasts. This severe gear lube will protect bearings, gears from friction and exceeds performance of any regular gear oil out there! Keep your truck or vehicle out of the shop and avoid costly repairs with this made in the USA lube. |
SVTPK-EA
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Recommended coolants for my Chevrolet Trucks G20 Hd Van
| Product Name | Product Description | Capacities | Product |
|---|---|---|---|
| Passenger Car & Light Truck Antifreeze & Coolant | maximum protection for your 1981 Chevrolet Trucks G20 Hd Van under extreme temperatures and operating conditions! Lasts up to 150,000 miles or five years! (whichever comes first) |
ANTPC1G-EA
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|
| Low Toxicity Antifreeze and Engine Coolant | Lasts in your 1981 Chevrolet Trucks G20 Hd Van for up to 150,000 miles or five years! (whichever comes first). Biodegradable! |
ANT1G-EA
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Do a great thing for the environment! By millions of people changing their oil less often, disposal of oil is diminished! In addition to this, you will save hours on a weekend since you will only have to change your oil every year if you drive 15,000 miles or less each calendar year. Also, Amsoil is proudly made in the U.S.A. and supporting American workers is a great thing to do while providing outstanding protection to your car or truck! Don't change your own oil? Do a search for a local mechanic and they should change it for you for no more than 1 hour labor. Take the oil and the filter. If you really want to bulletproof your engine, get the transmission fluid for your vehicle listed on this page!
