blynzoo said:For the first oil change, (sorry to those who have already done it), it should be at about 1k-1500 mi, and should be a NON-synthetic oil. After that, you can switch if you like (I use Castrol Syntec). The reason is, a synthetic is very good at what it does (reducing drag). However, whenever a new block/head is manufactured, there are still (despite the best efforts of any manufacturer) still little pieces of "stuff" (mostly metal shavings) in the motor from manufacture, let alone the possibility of some rogue particles that might have found their way in during the manufacturing process. Non-synthetics grab onto these particles, since they do not reduce friction as well as synthetics. You want a little more grab during your first oil change to get all that crap out of the motor. When we used to build SCCA racers, we'd get the newly machined block and just pour bottles of organic through the motor to get out crap. Synthetic oils are so good at what they do that all particles may not be carried out with the oil when you do that second oil change (the one after the 1500mi one).
Not doing this is no big deal, no reason to freak out, but doing it will slightly extend the life of the motor, and also protect you from any unexpected particles that might have got in the motor.![]()
Again, just my experience.
Don said:I've switched back and forth in most everything I've driven for the past 15 years or so.
I normally run Castrol GTX and change every 3,000 miles - Has worked great for me for about a million miles now (no exagerration).
If I'm doing lots of travelling, and 3,000 mile changes would be every few weeks, I run synthetic, and change every 5,000.
My P5 had Castrol for the first 2 changes, and then I put in synthetic, as we were leaving on a 6,500 mile trip to Seattle and back. I changed it just before we left, and then 3 weeks (and 6,500 miles) later.
Don