If it's truly that low miles you can tell. Clean spark plugs. Minimal oil buildup in the TB. Little carbon buildup in the EGR. PCV clean. Pulleys run smooth, tight, without noise or play or noticeable wear. No sludge buildup inside valve cover. Electrical tape connections not worn or heat damaged.

Gaskets may leak, hoses may dry rot or brittle, engine may be dirty from being outside, etc.

If it was me I would pull an oil sample and send it to Blackstone Labs. For $20-30 it's worth it.