Below you will find the best synthetic oil for a 1991 Buick ROADMASTER. 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 1991 Roadmaster
| Product Name | Product Description | Capacities | Product |
|---|---|---|---|
| Signature Series 5W-30 Synthetic Motor Oil | Save time and money and costly repairs at the auto shop! Amsoil has your back! Bullet proof your Roadmaster's engine! | With filter 4.5 quarts After refill check oil level. |
ASLQT-EA
Add To Cart  Add To Cart |
| XL 5W-30 Synthetic Motor Oil | Protect your Roadmaster with the best synthetic oil! Amsoil backs up all claims with proof! Support American Oil! | With filter 4.5 quarts After refill check oil level. |
XLFQT-EA
Add To Cart Add To Cart |
| OE 5W-30 Synthetic Motor Oil | AMSOIL OE Synthetic Motor Oil is specially made for the extended oil change intervals recommended for your 1991 Buick Roadmaster 5.0L. 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. | With filter 4.5 quarts After refill check oil level. |
OEFQT-EA
Add To Cart Add To Cart |
Recommended oil filters for my 1991 Roadmaster
| Product Name | Product Description | Product |
|---|---|---|
| AMSOIL Ea Oil Filters | This filter is for your 1991 Buick Roadmaster and is designed to last up to 25k (normal conditions) or 15k miles (severe conditions) or 1 year, whichever comes first. |
EAO59-EA
Add To Cart Add To Cart |
| WIX Oil Filter | WIX oil filter change intervals for your 1991 Buick Roadmaster are extended OEM recommendations to match the drain intervals of AMSOIL XL Motor oil. (12,000 miles or 1 year, whichever comes first). |
51069-EA
Add To Cart Add To Cart |
Recommended transmission fluids for my 1991 Roadmaster
| Product Name | Note | Capacities | Product Description | Product |
|---|---|---|---|---|
| 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 |
4 speed 4L60 Total Fill 11 quarts 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
Add To Cart Add To Cart |
| 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 |
4 speed 4L60 Total Fill 11 quarts 5 quarts Initial Fill | Outstanding protection and resists varnish! Change interval based on your Roadmaster owner's manual. |
OTLQT-EA
Add To Cart Add To Cart |
Transmission filters
| Product Name | Product Description | Product |
|---|---|---|
| WIX Transmission Filter | WIX Transmission Filter will protect your 1991 Buick Roadmaster's transmission from harmful debris and the awesome filtration will reduce wear in your Roadmaster. |
58897-EA
Add To Cart Add To Cart |
Differential for my Buick Roadmaster
| Product Name | Note | Capacities | Product Description | Product |
|---|---|---|---|---|
| SEVERE GEAR® 80W-90 | (1) Limited slip identification: tag under cover-attaching bolt. Models with limited slip use 4 oz GM P/N 1052358 additive or equivalent when fluid is changed. |
With 7.5 RG Rear 3.6 pints
With 8.5 RG Rear 4.2 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
Add To Cart Add To Cart |
| SEVERE GEAR® 75W-90 | (1) Limited slip identification: tag under cover-attaching bolt. Models with limited slip use 4 oz GM P/N 1052358 additive or equivalent when fluid is changed. |
With 7.5 RG Rear 3.6 pints
With 8.5 RG Rear 4.2 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
Add To Cart Add To Cart |
| SEVERE GEAR® 75W-110 | (1) Limited slip identification: tag under cover-attaching bolt. Models with limited slip use 4 oz GM P/N 1052358 additive or equivalent when fluid is changed. |
With 7.5 RG Rear 3.6 pints
With 8.5 RG Rear 4.2 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
Add To Cart Add To Cart |
Recommended coolants for my Buick Roadmaster
| Product Name | Product Description | Capacities | Product |
|---|---|---|---|
| Passenger Car & Light Truck Antifreeze & Coolant | maximum protection for your 1991 Buick Roadmaster under extreme temperatures and operating conditions! Lasts up to 150,000 miles or five years! (whichever comes first) |
ANTPC1G-EA
Add To Cart Add To Cart |
|
| Low Toxicity Antifreeze and Engine Coolant | Lasts in your 1991 Buick Roadmaster for up to 150,000 miles or five years! (whichever comes first). Biodegradable! |
ANT1G-EA
Add To Cart Add To Cart |
Amsoil is better for the environment. Not only do we have non-toxic coolant, but also a longer lasting oil equates to less frequent oil changes per year. This results in less dumping of oil. Can you imagine if millions of people dumped less oil per year? Let's crunch some numbers. A vehicle that uses 4 quarts and lasts 1 year, that is 4,000,000 quarts that will be disposed across a sample of a million vehicles. Now if those same vehicles are changing the oil 4 times a year due to regular oil that lasts much less, that is 16 quarts disposed of a year or 16,000,000 quarts in a sample of 1 million vehicles. There are way more vehicles than this on the road. These numbers show way less oil disposed of and much less oil consumption.
