Bedrock 15W-40
SYNTHETIC BLEND
HEAVY-DUTY ENGINE OIL
BUILT FOR EVERY LOAD.
SAE 15W-40 synthetic blend diesel engine oil for on-highway trucks, diesel pickups and off-road equipment
Bedrock 15W-40 is a synthetic blend heavy-duty diesel engine oil in the grade that heavy-duty diesel engine makers list as the standard fill for on-highway trucks and off-road equipment. It is meant for the engines that work along the Gulf Coast: over-the-road tractors, vocational trucks, diesel pickups, and the loaders, dozers and tractors that run on construction sites and farms. One grade covers a mixed fleet, which keeps the shop's oil inventory simple.
In service, the oil has several jobs at once. At start-up it needs to reach the turbocharger and the upper engine quickly, and at operating temperature it needs to keep a full oil film between pistons, rings, bearings and the valve train. Heavy-duty diesel oils in this grade also carry soot and combustion by-products in suspension until the oil is drained, so they do not settle as sludge or build deposits on hot parts.
Bedrock 15W-40 is the core grade of the Bedrock engine oil line and the one to stock when a fleet runs one oil across trucks, pickups and equipment. Fleets whose engine makers allow a lighter grade can look at Bedrock 10W-30; engines that need a heavier film at operating temperature move up to the 15W-50 or 20W-50. It comes in all five package sizes, from the 1-gallon jug to the 275-gallon tote.
Sheets are sent by email on request.
Applications
- Over-the-road tractors in regional and long-haul service
- Vocational trucks: dump trucks, mixers, roll-offs and refuse trucks in stop-and-go city work
- Diesel pickups that tow and haul for work, where the owner's manual calls for a 15W-40 heavy-duty oil
- Construction equipment: excavators, loaders, dozers and compactors
- Farm tractors, combines and irrigation engines
- Oilfield service trucks and stationary diesel engines on well sites
- Mixed fleets that standardize on one engine oil across trucks, pickups and equipment

Performance
- Keeps a stable oil film on pistons, rings, bearings and valve train parts under sustained load
- Holds soot and combustion by-products in suspension so they drain out with the oil instead of forming sludge and deposits
- Resists oxidation and thickening through long hours at operating temperature
- Reaches the turbocharger and upper engine quickly on start-up
- Helps protect against rust and corrosion during shutdowns and wet weather
- Formulated for use where a 15W-40 heavy-duty diesel engine oil is specified
Specifications
Bedrock 15W-40 is an SAE 15W-40 synthetic blend heavy-duty diesel engine oil. The API service category and any engine maker specifications it is formulated to meet are listed on the Product Data Sheet, available on request.
Typical properties
Typical properties for Bedrock 15W-40 are listed on the Product Data Sheet, available on request from [email protected].
Packages and part numbers
| Package | Part number | Case pack | |
|---|---|---|---|
| 1-gallon jug | BED15W40G | 4 per case | |
| 2-gallon jug | BED15W402G | 3 per case | |
| 5-gallon pail | BED15W405G | Single | |
| 55-gallon drum | BED15W4055G | Single | |
| 275-gallon tote | BED15W40TG | Single |
Bedrock 15W-40 comes in five packages: 1-gallon jug, 2-gallon jug, 5-gallon pail, 55-gallon drum and 275-gallon tote.
Order by part number from your dealer → Where to Buy
More in Heavy-Duty Engine Oils
Bedrock 10W-30 Synthetic Blend Heavy-Duty Engine Oil
SAE 10W-30 synthetic blend diesel engine oil for on-highway fleets whose engine makers specify a 10W-30 grade
Learn more about Bedrock 10W-30 →Bedrock 15W-50 Synthetic Blend Heavy-Duty Engine Oil
SAE 15W-50 synthetic blend heavy-duty engine oil, a heavier grade for engines whose maker allows a 15W-50
Learn more about Bedrock 15W-50 →Bedrock 20W-50 Synthetic Blend Heavy-Duty Engine Oil
SAE 20W-50 synthetic blend heavy-duty engine oil, the heaviest grade in the Bedrock engine oil line, for engines whose maker allows a 20W-50
Learn more about Bedrock 20W-50 →Bedrock SAE 30 Non-Detergent Motor Oil
SAE 30 non-detergent motor oil for equipment whose maker calls for an ND oil
Learn more about Bedrock SAE 30 ND →Sizes and part numbers
| Product | 1 GAL | 2 GAL | 5 GAL | 55 GAL | 275 GAL |
|---|---|---|---|---|---|
| Bedrock 15W-40 Synthetic Blend Heavy-Duty Engine Oil15W-40 | BED15W40G | BED15W402G | BED15W405G | BED15W4055G | BED15W40TG |
| Bedrock 10W-30 Synthetic Blend Heavy-Duty Engine Oil10W-30 | BED10W30G | — | — | BED10W3055G | BED10W30TG |
| Bedrock 15W-50 Synthetic Blend Heavy-Duty Engine Oil15W-50 | — | BED15W502G | — | — | — |
| Bedrock 20W-50 Synthetic Blend Heavy-Duty Engine Oil20W-50 | — | — | — | — | BED20W50TG |
| Bedrock SAE 30 Non-Detergent Motor OilSAE 30 ND | — | — | BEDND305G | — | — |
Swipe sideways to see every size →
Order by Bedrock part number from your dealer.
Frequently asked questions
Which API category and engine maker specifications is Bedrock 15W-40 formulated for?
They are listed on the Product Data Sheet, available on request from [email protected]. Before you switch, compare the sheet with the API category and the specification named in your engine's owner's manual or service bulletin.
How do I switch an engine to Bedrock 15W-40?
Change the oil and filter at the next scheduled drain and fill with Bedrock 15W-40 where the owner's manual calls for a 15W-40 heavy-duty diesel oil. The API category and the engine maker specifications it is formulated for are on the Product Data Sheet.
Can I use Bedrock 15W-40 in my diesel pickup?
Yes, where the owner's manual calls for a 15W-40 heavy-duty diesel engine oil, which is common for diesel pickups that tow and haul. If the manual lists a lighter grade for your model, ask your Bedrock dealer about Bedrock 10W-30 instead.
Specifications and typical properties are stated on each product's data sheet; follow the equipment maker's service recommendations.
Other Bedrock families
More from Bedrock

Find a dealer
TTM Diesel in Houston stocks the line; more dealers are being added.
Read more →
Data sheets
A PDS and an SDS for every product, sent by email on request.
Read more →
Request a quote
Write to [email protected] with the part numbers and quantities.
Read more →Bedrock 10W-30 Synthetic Blend Heavy-Duty Engine Oil
SAE 10W-30 synthetic blend diesel engine oil for on-highway fleets whose engine makers specify a 10W-30 grade
Read more →