I see your point, but I *think* those cars are already broken In a little from the factory.Kalmairn said:Ah, yes, the holy war of synth vs. conventional.
As far as break-in - Porsche, Viper, BMW, among others - use synth in the factory. "If it's good enough for them, it's good enough for me."
Some/most manufacturers used to use a special oil for break-in, this is rarely (never?) the case with modern motors. The primary concern would now be particulate matter coming free from friction components and contaminating the oil - many sports car drivers will replace the oil at the end of documented break-in (1200 miles in the G).
By some stretch, there are experiences that say that motors take 5-10k to really "come in". That could say that your full break-in period is 5-10k miles, at least for full performance - regardless if you baby it for that whole period or not.
I think that it comes down to what you're comfortable with. For every person who has documentative proof that one option works better, there's one with the exact opposite information. I don't think it matters enough to worry; if you have the money and are willing to spend it on synth, do it. If you don't or see no value in it, don't.
Personally, I use synth. Currently, I'm using Royal Purple - and I've been made a convert from Mobil1. My fuel economy did go up a consistent 2mpg, and my SOP ButtMeter says the car is a little stronger (see VDC thread ).
When I have the chance I rev the holy hell out of my motor. For those moments, I want the absolute maximum in protection - I have faith in synth to give that where I don't in conventional oils.
YMMV, caveat emptor, all that stuff.
He is absolutely correct, and like the other guy said if Porsche and Corvettes come with Mobil 1, it is good enough for me!!!05GCOUPE6MT said:You are not suppose to use synthetic oil during break in becuase it will not allow the engine to properly break in. It protects to good.