oil change question

[Topless]

Agreed. I have run Castrol 5w40 over the last year and notice less valve train/chain noise on startup. No other changes or indications I am aware of. I change oil typically 2x yr between 3-4k miles since I have been running Time Trials. If the oil ever darkens or gets an odor I dump it right away.

[Pat]

This reminds me...my car seems to have quite a bit of chatter/rattle the first few seconds it starts up when the weather is cold (<40F). Anyone else notice this?

[Idaho Red Rocket 3]

My '98 has that rattle clatter on start up most of the time. I find if I turn on the key then turn off the A/C-Heater ( since it is always on when the key is turned on) then start the engine, I don't get that rattle clatter so much. Sometimes it does, sometimes it doesn't. Is there a conection or is it just coincidence ?

Also, I've been using M1 10/30. I'm thinking of going to 10/40. Thoughts ?

[Steve Tinker]

If you log onto www.lnengineering.com website and check their advice re oils, a W30 grade oil is just too thin for the M96 engine. The Porsche list of approved oil manufacturers / grades also recommend just about all the weights to be 0W40 or 5W40 grade oils.
Some people living in hot climates go for 15W50 grade oil. I tried that option but went back to 5W40 Shell Hellix as on the thicker oil I seemed to to lose engine performance.......