What 396.5A-L means in plain language
FMCSR 396.5A-L covers oil and grease leaks from the engine, transmission, and other vehicle components. When an inspector spots fluid dripping or pooling under your truck during a roadside inspection, they're looking for the source. If that leak originates from the engine block, transmission case, differential, power steering pump, or similar sealed systems, you can be cited.
This is different from a loose cap or minor seepage around a gasket that stopped leaking. The regulation targets active, ongoing leaks that indicate a maintenance or mechanical problem. The inspector documents the leak location and may require you to fix it before driving again—though most citations don't result in an out-of-service order.
What our enforcement data actually shows
Across our 13 million inspection records, 396.5A-L shows a remarkably low enforcement presence. We've recorded 174 all-time citations for this code, with only 3 citations in the last 12 months and 0 in the last 90 days. This ranks 396.5A-L at #1254 out of 3,036 FMCSR codes by citation volume—making it one of the rarest violations you can receive at roadside.
The out-of-service rate for 396.5A-L is 2.9%, meaning only 5 of those 174 citations resulted in an immediate out-of-service order. This is significantly lower than the all-FMCSR average OOS rate of 31.4%. In plain terms: inspectors cite oil leaks when they find them, but they rarely ground your truck on the spot. Most drivers receive a citation and are ordered to repair the leak within a compliance window.
The scarcity of citations suggests two things. First, most fleets catch and fix leaks during routine maintenance before they get to roadside. Second, when inspectors do find one, the violation is not treated as an immediate safety threat in most cases.
Who gets cited most
Our data shows that in the last 180 days, California accounted for 3 citations, the only state with recorded 396.5A-L violations in that period. All 3 were not placed out of service, reflecting the 0.0% OOS rate for California citations.
Historically, Bybee Transport Inc (USDOT 238387) appears in our records with 4 citations for this code. Arnulfo Andrade Corella (USDOT 1247617) follows with 3 citations. However, these numbers span years of operation across millions of miles. The low frequency means that even fleets appearing in the top list have encountered this violation only occasionally.
How severe is this compared to similar codes
396.5A-L sits in the Vehicle Maintenance category alongside codes that are cited far more often. For context:
- 393.9(a) (Inoperable required lamps) has 660,737 all-time citations with a 15.4% OOS rate—nearly 4,000 times more frequent than oil leaks.
- 396.3(a)(1) (Inspection/repair/maintenance - general) has 236,919 citations and a 45.3% OOS rate, indicating that broad maintenance violations are enforced much more aggressively.
- 393.11 (Lighting devices/reflectors) has 179,734 citations at a 1.8% OOS rate—still over 1,000 times more common than oil leaks.
The rarity of 396.5A-L enforcement suggests that either leaks are genuinely uncommon in the fleet population, or inspectors prioritize other defects first. Either way, your citation is statistically unusual.
How to avoid it
Oil and grease leaks don't appear suddenly—they develop over time as seals wear, gaskets fail, or fasteners loosen. Here's what you can do:
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Check under your truck during every pre-trip inspection. Get down and look at the engine block, transmission pan, and differentials. Fresh oil on the ground or on components is a red flag. If you see seepage, report it to your dispatcher and get it serviced before you roll.
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Know your truck's history. If your engine or transmission has been repaired recently, or if you're operating a Freightliner (which accounts for 21 of the 174 citations in our database), pay extra attention. Freightliner models represent the largest share of oil-leak citations; Kenworth comes second with 9.
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Don't ignore minor leaks. A small drip today becomes a noticeable puddle in 500 miles. Most fleets that avoid this citation catch leaks during scheduled maintenance, not at roadside. If you notice your oil or fluid levels dropping faster than normal, get it checked.
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Verify gasket and seal integrity after any major service. Oil leaks often start at gasket seams or seal interfaces where technicians have been working. After transmission work, engine repair, or differential service, run a pre-trip the day you get the truck back and again the next morning.
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Report leaks to dispatch immediately. Don't try to drive through it. A citation takes time and money to resolve, but preventive repair takes less of both.