Recently my auto mechanic informed me that 100% synthetic motor oil is not recommended for 4-cylinder engines. He informed me that a synthetic blend in the oil best suited for a 4-cylinder. Is this true? I have been using a pure synthetic in my 4-cylinder Toyota Camry. Am I doing any harm to the e…

Synthetic oil in 4-cylinder vehicles

Whitey June 22, 2010, 4:34pm 2

What type of oil does your owner’s manual recommend?

There is no set rule for all four cylinder engines. It varies by car and engine design.