Can an old oil stain actually come out of concrete?
Most of it can. Fresh spills clear fully, and multi-year stains generally lighten far enough that they no longer read from the street.
Oil migrates downward into concrete over time. A drip from last weekend sits in the top layer and comes out with one degreasing pass, while a spot that has been feeding a parking space for five years has soaked well below the surface, and no single treatment reaches all of it.
For those older stains we use a poultice — an absorbent paste that draws oil upward as it dries over several hours. It is slower than a wash, but it works with the physics of the problem instead of against it.
We tell you which category your stain falls into during the walk-through, before any money changes hands, so nobody is expecting a showroom slab from a treatment that will realistically get to eighty or ninety percent.
Why do Lathrop driveways collect so much oil staining?
Long commutes, heavy vehicle counts per household, and trailers or RVs parked on residential slabs.
Lathrop is a commuter town. Households routinely run two or three vehicles that cover serious mileage over the Altamont and down I-5, and higher-mileage engines drip more. The staining almost always lines up neatly with where each car parks.
Delta recreation adds the second pattern. Boats and RVs staged on driveways and side pads for weekend trips leave hydraulic and gear-oil marks in tight clusters near the tongue and axles, often on concrete that also sat covered and damp.
Garage slabs are the third area, and they need a low-odor approach with water recovery since the space is enclosed and usually attached to living areas.
Does oil actually harm the concrete, or is it only cosmetic?
It is mostly cosmetic, but saturated oil does soften the surface paste over time and keeps sealers from bonding.
Oil-soaked concrete cannot accept a sealer, which means an untreated stain quietly rules out the one step that would protect the rest of the slab. Any sealing plan should start with degreasing.
Long-term saturation also weakens the cement paste at the surface, so heavily stained parking spots tend to dust and spall earlier than the concrete around them. Clearing the oil slows that down.
There is a practical angle too: oily concrete traps everything else. Dust, tire film and algae stick to it, so a stained parking area drags down the appearance of the whole driveway well beyond the stain itself.
About 7 in 10 Lathrop garage aprons show 2 or more drip zones.
Each Lathrop degrease pass uses 12 gallons of hot water per 100 square feet.
Oil on Lathrop driveways is broken down with 180°F water and two 12-minute degreaser cycles.
Add-on pricing in Lathrop begins at $150, and standalone 95330 visits begin at $297.
Lathrop degreasing is scheduled between March and October, when a Lathrop slab dries in under an hour and a second pass can run the same day.
