Re: Oil questions
Old information, if it ever was true, it's not true now. All kinds of cars are coming out of the factory with synthetic oils. You can never go wrong following the manual.
How many engines have you assembled and broke in with synthetic oil? Everyone I've been involved with, from go carts, bikes, cars and trucks had cylinder glazing.
Yes, cars are coming to the consumer with synthetic oil, but not knowing what the manufacturer's break in procedure is, means you are guessing. Anything can be done to the engine before the consumer gets it.
The common complaint right now is conventional oil not having enough zinc in it's formula, so break in oil is being sold.
The only example I have is the DRY sump Harley FL 74 inch engine. At the end of the engine assembly line, the engine was put on a test bench. Engine was turned over until the Top Dead Center mark could be seen on the flywheel through the timing hole in the engine case. A template was use to paint two timing marks on the stator. A 120 volt motor was chucked to the flywheel spline, one or two spark plug wires were attached to the spark plug/s. Engine electrical plug attached and two oil lines, one supply, one evacuation, were attached to the engine oil pump. The electric motor was started, engine ignition timing, dwell was set and oil supplied to the engine. The engine was then put on a rack, and went to the final assembly department. (Sometimes , on second shift, we started the engine using naphtha, used to clean cylinders for using a micrometer.) At this point, the company could put what ever oil in the bike's oil tank they wanted to. The point is, what ever oil is in the vehicle's engine, doesn't automatically dictate how the engine was broken in.
From the Redline synthetic oil company:
For performance engines, we recommend using conventional 10w30 motor oil to ensure proper piston ring seating. We recommend using this oil in combination with our Engine Oil Break In Additive, which features the antiwear chemicals necessary to protect valve train components like camshafts, rollers, and tappets. Though most conventional oils are missing the important anti wear components that you find in Red Line's synthetic motor oils, the conventional oil is not as slick as Red Line and will allow the piston rings to seat more quickly. If you allow 1500 to 2000 miles in a street engine or 20 to 30 minutes on the dyno at low rpm, the rings will have had sufficient time to seat and the high initial break-in wear will have occurred. For new road cars, always follow the manufacturer recommendations and initial oil change recommendations for break-in.
http://www.redlineoil.com/techinfo_faq.aspx
here we go again................
