Is

IS engines are inline, four-cylinder powerplants that Toyota developed and refined over decades. You'll find them in everything from compact cars and sedans to light trucks and even some early SUVs. These engines earned a reputation for reliability and longevity, which is why many owners still maintain them today. Whether your vehicle has an original IS engine or you're working on one that's been in service for years, understanding its specific maintenance needs keeps it running dependably.

The articles here cover the practical tasks that IS engine owners face: how to change the oil and filter on your particular model year, what type and weight of oil works best, and how often you should perform this maintenance. You'll also find information about the differences between IS engine generations and what those variations mean for your service routine.