Diesel Performance & Truck Repair in Springboro, OH
Specialty diesel service for late-model pickup trucks, performance builds, and commercial rigs across Springboro and the Warren County corridor — from County Line Diesel Performance.
Built For The Right Truck.
If you've spent eighty grand on a loaded 3500 dually, the last place it needs to go is a quick-lube chain or a shop that does diesel "on the side." That truck deserves a diesel specialist. One who knows the platform, knows the common failures, and treats it like the investment it is.
County Line Diesel Performance is about 25 minutes east of Springboro in Harveysburg — far enough to be out of the dealer markup zone, close enough to be a reasonable drop-off. From performance tuning to engine work to routine maintenance done right, we handle late-model diesel pickups the way they're supposed to be handled.
Specialty Diesel Work.
Performance, repair, and maintenance done with the care a high-end truck actually deserves.
Performance & Tuning
Dialed-in tunes, programmers, turbo upgrades, and full power builds — tow more, drive better, or chase the number that matters to you.
Engine Repair
From a check engine light to a hard-start to a full rebuild. Honest diagnosis, real fixes, and parts that match the truck.
Heavy Duty Trucks
Commercial truck repair, DOT inspections, fleet maintenance for Springboro-area contractors and businesses running Class 6–8 rigs.
Equipment Work
Skid steers, tractors, excavators, and the heavy iron working construction sites and acreages around Warren County.
Done Right.
For most jobs, the difference between the dealer, the chain shop, and a specialist isn't subtle.
Specialist Knowledge
We see these platforms every day. We know what fails, what to check, and what to leave alone.
Talk Direct
You talk to the person doing the work — not a service writer translating between you and a tech in the back.
Right-Sized Pricing
Dealer-level work without dealer-level overhead. Honest hourly rates, fair parts margins, no surprises.
Built To Last
Whatever we do, we do with the idea you'll be driving this truck for years. Tunes are sustainable. Repairs are real fixes.
Springboro Questions.
What folks from the area ask most. Anything else, give us a call.
How far are you from Springboro?
About 25 minutes east, mostly via SR-73 or SR-122. Easy run for a drop-off and a great excuse to spend the morning in the country.
I just bought a new diesel. Should I do anything to it?
New trucks don't need much beyond following the maintenance schedule. We can do oil and DEF service, set you up with a baseline tune if you want one, and walk you through what to watch for on your specific platform. Call us when it's time for the first service.
Do you work on luxury diesel SUVs and crossover diesels?
Yes — diesel-powered SUVs (Cummins-powered, EcoDiesel, etc.) and luxury diesel platforms are part of what we work on. Whatever burns diesel, we'll take a look.
Will your work affect my factory warranty?
It depends on the work. Routine repair and maintenance generally doesn't impact factory coverage. Performance modifications (tunes, deletes) can affect coverage on related components — we'll talk through it before any work starts so you know what you're trading off.