Delo and Shell Rotella are two of the best-known names in heavy-duty diesel engine oil. We offer mobile oil changes with both: our Delo SynBlend Diesel Oil Change starts at $500 and our Shell Rotella T6 Full Synthetic Diesel Oil Change starts at $600.
Customers often ask which one is better. The honest answer is that the right oil depends more on your engine's requirements than on the logo on the jug.
What matters most: your engine's specification
Every diesel engine manufacturer specifies which oil categories and viscosities are approved for their engines. Your owner's manual or engine documentation lists these requirements. Whatever brand you choose, it should meet that specification.
Both brands offer products designed for heavy-duty diesel engines. Before your oil change, check the product's labeled specifications against your engine manufacturer's requirements — or ask us and we'll check with you.
Delo 400 XLE SB SynBlend
Delo is Chevron's line of heavy-duty engine oils. We use Delo 400 XLE SB SynBlend 15W-40, a synthetic-blend heavy-duty diesel oil. Our Delo SynBlend Diesel Oil Change is a solid choice at our lower starting price point.
Shell Rotella T6 full synthetic
Rotella T6 is Shell's full synthetic heavy-duty diesel engine oil line. Many owners and fleets have standardized on it. Our Shell Rotella T6 Oil Change starts at $600.
How to choose
- Start with your engine manufacturer's oil specification and viscosity.
- If your fleet already standardizes on one brand, stay consistent — it simplifies records.
- Consider your drain interval and duty cycle, and follow the manufacturer's guidance for severe service.
- Compare the full price for your truck — capacity and filters affect both options.
Why our prices say “starting at”
Oil capacity varies a lot between engines, and some trucks need additional filters or service items. The starting price is a clear baseline. Final pricing may vary depending on vehicle, engine, oil capacity, filters, and service requirements, and we confirm pricing before service begins. See all options on our truck oil change page.
Frequently asked questions
Can I switch from Delo to Rotella T6 (or the other way)?
Generally, switching between oils that both meet your engine manufacturer's specification is fine. If you have concerns about a specific engine, ask us or check the engine documentation.
Which oil is cheaper?
Our Delo SynBlend Diesel Oil Change starts at $500 and our Shell Rotella T6 option starts at $600. Final price depends on your truck.