All About Automotive recommends having oil inspected every 3,000 miles for proper level and contamination. We suggest servicing at this interval to maintain cleanliness, or checking every additional 1,000 miles until the oil becomes dirty or the manufacturer's recommended interval is reached.
Oil Change Intervals
Vehicle manufacturers have increased intervals to "anywhere from every 5,000 miles up to every 15,000 miles," while many repair facilities suggest the traditional standard of every 3 months or 3,000 miles. Synthetic oil changes should occur approximately every 5 months or 5,000 miles.
Cost and Profitability
Shops don't profit significantly from oil changes. A basic oil change costs shops roughly $40 when accounting for parts, labor, and overhead, while selling prices range from $19–$50.
Why Regular Changes Matter
Engine oil serves to "clean, cool and lubricate," and dirty oil compromises performance. Excessive contamination causes abrasive wear to crankshafts, bearings, and valve trains. Modern engines with variable valve timing and turbocharged components are particularly sensitive to dirty oil, which can cause internal coking and sludge issues.
Manufacturers consider "1 quart of engine oil consumed every 1,000 miles of driving" normal. Keeping up with regular checks ensures you catch consumption issues before they become serious problems.