1990 Mercedes-Benz 420SEL Q&A

1990 Mercedes-Benz 420SEL Question: excessive smoking

car smokes after being driven for half hour around town or up hill, car has 148,000 miles and has been resonably well maintained. It uses about 1 quart oil per 3,000 miles. Thanks. -
Answer 1
Worn valve guides or failed valve guide seals and piston rings worn or sticky can cause that concern. Greg -
Comment 1
Thanks-sorry to get bacxk so late -