Can you put synthetic oil in a 1999 Jeep Grand Cherokee lerado?
Yes, you can put synthetic oil in a 1999 Jeep Grand Cherokee Laredo. However, you should always check your owner's manual to confirm the recommended oil viscosity (like 5W-30 or 10W-30) and specifications (like API certifications). While synthetic oil is generally better for engine longevity and performance, using a synthetic oil with a different viscosity than recommended could be detrimental.