Quote:
Originally Posted by CV3435
after reading the link you provided I'm unclear about two things.... in the article it says "Remember that both hard acceleration and hard engine braking (deceleration) are equally important during the break in process"... does this mean throwing it in neutral after running hard through the gears or leaving the car in gear and allowing the engine to decelerate itself? Also It says not to use synthetic oils while in the break-in stage and to use 10w-40 petroleum oils.... This is the typical oil most people use when getting their oil changed right? Just non synthetic?
|
He answered your first question already...see below. About your second question, I was wondering myself, but I don't think the mobil 1 that comes in the car will really hurt anything, maybe just take a little longer to break in the engine then with a non-synthetic.
Quote:
Originally Posted by Darin Morgan
Earlier in this thread a very perceptive individual pointed out to me that the Mototunes web site stated to accelerate and decelerate during the engine break in procedure.  This worried me a bit because NO automotive engine should ever be motored down ( engine braked) during break in and I know this from 26 years of engine break in experience on literally thousands of engines. I was very perplexed as to why the guy on the Mototunes web site would say this. Then it came to me like a slap in the face. He builds motorcycle engines! These engines have Nickasil and or “chrome” coated cylinder walls! The rings wear characteristics and ring material itself is far different than what ever is used in an OEM engine. We have used Nickasil in Pro Stock engines before but just about everyone now runs cast iron (Compacted graphite) cylinder walls. The break in procedure for Nickasil is far different in the fact that the rings can loose lubrication, Gaul or micro weld in the ring groove and on the wall itself. For this reason the engine break in procedure is different in the regard to engine braking or “motoring down”. It’s a way of getting oil up to the ring to keep it from wiping out. Molly, PVD or coated faced rings used on cast iron cylinder walls have totally different wear characteristics and do not need the additional oil that comes from motoring down or engine breaking.
http://en.wikipedia.org/wiki/Nikasil
Nikasil is a trademarked electrodeposited oleophilic nickel matrix silicon carbide coating for engine components, mainly piston engine cylinder liners. |