What kind of lubricant is used for car doors?

[ZoeLee]

Door lubrication can be done with grease or engine oil, or hinge lubricating grease can be used. Here is an introduction to automotive lubricants: 1. Introduction: Automotive lubricants are divided into several categories, including mineral lubricants, synthetic lubricants, and semi-synthetic lubricants. Lubricants are formulated from hydrocarbons refined from natural gas and crude oil. There is no clear international definition for synthetic oil, but generally, lubricants containing PAO are referred to as synthetic engine oil. 2. Raw materials: For commercially available products labeled as synthetic oil, the PAO content is mostly below 12%. Full synthetic engine oil is formulated with 100% PAO (Poly-Alpha-Olefin) as the base oil and additives.

[LeBenjamin]

I'm quite experienced with door lubrication. I always check it when washing my car. Hinges and door locks should be handled separately: Lithium-based grease works best for hinges – the white or blue kind, just apply a thin layer, don't overdo it or it'll attract dust. For door lock mechanisms, use a penetrating lubricant spray like WD-40 to remove rust first, then apply dedicated door lock lubricant. Don't forget the rubber seals either – spray them with silicone-based lubricant to prevent aging and cracking. Never use engine oil as substitute – it's too thin and will leak everywhere, actually accelerating dust accumulation. I always keep a can of lithium-based grease in my car – it's cheap and durable. Reapplying every six months keeps the doors opening and closing smoothly.

[McCarson]

As a seasoned driver, I've encountered door squeaking issues more than once. Last time, I found the hinges creaking, and upon disassembly, I saw the grease had dried up and clumped. The mechanic told me: choose grease with good temperature resistance, lithium-based or silicone-based grease is the most reliable, with a working temperature up to 120°C or more. When the door lock sticks, use canned spray, just two sprays on the latch for immediate effect. Important tip: never use butter! That stuff solidifies in cold weather and can freeze the door shut in winter. Also, seal maintenance is often overlooked; using rubber protectant spray can extend its lifespan. Remember to check lubrication every quarter, it's much more cost-effective than replacing the entire hinge assembly.

[MacAngela]

White lithium grease is the preferred choice for door lubrication, costing just over ten dollars per can and lasting several years. Apply a thin layer to hinge pivots, as excess can attract dust. For door locks, spray-type penetrating lubricants are more convenient—simply insert the thin tube and spray directly into the keyhole. I once tried using engine oil as a substitute, but it seeped into the door trim panels, making cleanup a hassle. Avoid applying grease near brake cables, as it may corrode rubber components. In extreme climates, opt for synthetic grease: low-temperature antifreeze types for northern regions and high-temperature-resistant variants for the south. General-purpose grease from hardware stores works perfectly fine—no need to splurge on automotive-branded products.