About LI Diesel Guys
Ronkonkoma sits along a busy freight corridor on Long Island, with distribution warehouses and trucking operations feeding I-495 and the surrounding logistics network, creating steady demand for diesel service. LI Diesel Guys operates at 7 15th St in Ronkonkoma, New York, serving owner-operators, fleet managers, and equipment owners across a 15-mile radius that includes East Islip, Hauppauge, Medford, and Bay Shore. The shop handles diesel-specific repair and maintenance work, stocks OEM parts, and accommodates fleet accounts for operators who need consistent service support. Call (631) 823-1000 to discuss your diesel repair needs.
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Our Services
OEM Parts
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Diesel Specialist
Customer Reviews
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Verified Customer
Google Review
Mike and his guys took great care in fixing my truck. Finding terrible work from the last shop in there they didn't hesitate to go do it right. Very knowledgeable about 6.0s and powestrokes, I won't bring my truck anywhere else now.
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Verified Customer
Google Review
Mike from LI Diesel guys was able to diagnose an issue that 3 other mechanic and myself have not been able to figure out for 3 months in the matter of a few minutes. They have a large Diesel facility with all the bells and whistles with a ...
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Verified Customer
Google Review
Mike and his team are awesome diesel mechanics. They do a monthly PM service on my trucks and repairs as needed. They also installed a Titan XXL fuel tank in my 2023 F450 and reprogrammed the computer to recognize the larger tank.