On this Bumper to Bumper radio show, Dave Riccio of Tri-City Transmission talks with mechanical engineer Cameron Thomas of Petro Canada about everything you ever wanted to know about motor oil. Also:

• Synthetic oil vs. conventional oil.
• Synthetics and synthetic blends.
• Different grades of oil and how they are made.
• What does the "w" in 10W30 stand for?
• How to imporve the performance of oil.
• Grease for recreational vehicles
• 2012 Highlander: Why is 020 the recommended oil?
• 2005 Dodge Ram Pickup: Mushy. Friend said to use a can of Stop Slip additive.
• 2007 40i BMW: Dealer say not to change transmission fluid.
• 2012 Ford Fiesta: Should I used the manufacturer's recommended oil weight?
• 2007 RAV4: Valvaleen NextGen Recycled Oil