Over time and miles, your car might start to slow down. It might not accelerate as quickly as it once did; the engine may not run as smoothly as you remember, or the fuel economy may dip—but ...

A Toyota dealer quoted $174 for a fuel injection service, but can a $15 bottle of Royal Purple do the same job? Do you really need the expensive cleaning for your RAV4 at 80,000 miles, or is the DIY ...

If you thought diesel fuel additives were merely store-bought products at your favorite auto store, you'd better think again. Fuel suppliers, refineries, and manufacturers are the biggest market for ...

We explain how Motul’s fuel and oil additives work with NGEN re-refined oils, when they save money for UK drivers, and when ...