oils and break in

[Drake_tr7]

I'd like to get some opinions...Motors I built for people (20 years ago last one)(never had one come apart...) my advice was "drive it like an old lady for 500 miles,drop the oil and filter then drive it like you're gonna drive it"that always worked for me...every time
Now JEGS tells me run it for 20 minutes drop the oil and go ahead and run it. The GT-40 came run in and full of oil so I'll do the 500 mile thing just being a scaredeycat on petroleum oil...but when do you guys think I can go silicone? I'm gonna take a NEW motor over onto silicone oil as soon as is feasible...opinions?

[cason1]

quote:Originally posted by Drake_tr7:
I'd like to get some opinions...Motors I built for people (20 years ago last one)(never had one come apart...) my advice was "drive it like an old lady for 500 miles,drop the oil and filter then drive it like you're gonna drive it"that always worked for me...every time
Now JEGS tells me run it for 20 minutes drop the oil and go ahead and run it. The GT-40 came run in and full of oil so I'll do the 500 mile thing just being a scaredeycat on petroleum oil...but when do you guys think I can go silicone? I'm gonna take a NEW motor over onto silicone oil as soon as is feasible...opinions?

Silicone??? You mean synthetic?. I have heard as soon as the factory/ builder breakin is finished your ready for synthetic.

[Drake_tr7]

well that's what they tell me bit I'm a little ascared wanna see what bluegrass says...

[Steve Moran]

Don't be ascared.
Silicone is for boobies and corners of intake manifold gaskets as well as a few assorted drivetrain gaskets, not engine oil formulations

[NYC LS8]

I put dino oil in mine for the first 500, changed it and the oil filter, put in dino oil again for the next 1000 or so, then changed to synthetic and it's been fine going on 5500 miles now - and I'm FAR from easy on my car. Oh, and there were a few WOT blasts thrown in in those first 500 miles, but that was mainly because I couldn't hold back. :D

Not saying that's THE way to do it - it's just the way I did it.

[ August 29, 2005: Message edited by: NYC LSC ]

[ August 29, 2005: Message edited by: NYC LSC ]

[84mark]

aren't there car makes for which 'mobil 1' is specified, and presumably delivered with? i see no reason synthetic lube would cause any problem, other than its greater expense for only going 500 miles or whatever...as for break-in, it ain't what it used to be...yes, you are advised not to subject the motor to any continual heavy high-speed stress or towing, but rather, going through a variety of driving modes, including some limited heavy acceleration and speed.....

[gadget73]

Lots of the reason for not going to synthetic oil straight away is because it lubricates better than standard oil. The fear is that unless there is some amount of friction, the rings and bearings and such won't wear enough to seat properly. I'm at about 13k on mine and shall be going to synthetic at my next oil change. Mostly the reason I have not already is because I had a bunch of standard oil to work through first, and I didn't want it to go to waste.

[cason1]

I was under the impression that that was the reason for the 500 mile break in period.

[Steve Moran]

gadget73.
I have always been told by oil manufacturers not to use synthetic oil to break in an engine just for that reason.

"The engine will never break in and will consume oil until you switch to some other type of oil for a few hundred to a thousand miles."

I was told by Dana Corp reps.

"Piston rings aren’t like they used to be years ago and that you do not have to run'em like your going to drive'em, it is just not necessary anymore.”

I don’t grasp that concept, it is like saying drive softly if you are going to drive hard when it is broke in and visa versa, I do know what they meant but their wording sounds so odd. It’s like they shouldn’t say anything, you are driving it like you always will right from the start.

[pro-five-oh]

quote:Originally posted by 84mark:
aren't there car makes for which 'mobil 1' is specified, and presumably delivered with?

Those motors are usually more complicated and/or have closer tolerances from the factory than any small block Ford V8. Same reason that many motors (including the 4.6L) are hard to find rebuilt, they are just tougher to rebuild.

I'd do basically what NYC LSC did, though I'd probably switch to synthetic around 5,000 miles.

[ekooke]

A Corvette is delivered from the factory with Mobil One in the crankcase. It's also possible that, since a 'Vette is such a limited production vehicle, the engine is run-in on a stand before installing it in the car.

[Kit Sullivan]

quote:Originally posted by ekooke:
A Corvette is delivered from the factory with Mobil One in the crankcase. It's also possible that, since a 'Vette is such a limited production vehicle, the engine is run-in on a stand before installing it in the car.

It's not. They just fill them with 'Mobil 1', ship 'em out and warranty what doesn't work correctly.

[SilverFox]

My opinion on break in:

Idel for about 3 minutes, let cool for few minutes, then idel again with varying throttle, let cool, then run it up to about operating RPM with varying throttle for about 30 minutes - drain - run the piss out of it.

DO NOT BREAK A MOTOR in on synthetics....I have always used petorleum - this way the bearings and have a chance to wear in better. Run Synth after a few thousand of petrol.

I also don't run my 2 stroke motors with sysnth the first tank of fuel either - same reason.

[pro-five-oh]

quote:Originally posted by ekooke:
A Corvette is delivered from the factory with Mobil One in the crankcase. It's also possible that, since a 'Vette is such a limited production vehicle, the engine is run-in on a stand before installing it in the car.

The only break-in they get is a dyno test before they drive off the factory floor. smile.gif

[Drake_tr7]

I'm gonna play it safe the motor was run by Ford motorsports and came with a filter and full of oil I'm gonna drive it gently for 500 miles fresh Valvolene and WIX filter and let er eat..go two changes 6k and go synthetic . It will be interesting to see how long a 5litre will last on 2005+ synthetic oils of course it will be at least ten years before I can tell you anything :)