How long does synthetic oil last? 7,500–10,000 miles in normal driving, up to 15,000 for extended-drain formulas — but time runs independently of mileage.
Oil life monitors are algorithm-based, not sensor-based. Here's when to trust yours, when to override it, and why the sticker is a sales tool.
Diesel truck oil changes cost more and follow different rules. Covers intervals, oil types, and certifications for Cummins, Duramax, and Powerstroke.
How often should you change your motor oil? The answer is in your owner's manual — not on that 3,000-mile windshield sticker.
The 3,000-mile oil change myth costs drivers money without protecting their engines. Here's what the real interval is — and why the sticker lies.