Oil? Synthetic, blend, or conventional

04-22-2005, 04:20 PM
I am coming up on my first oil change. I will most likely do it after the break in period before 3000 miles. I was planning on using mobil 1 5-30 synthetic. You can buy a 6 pack at costco for 24 bucks. The manufacturer specifies 5-30, but the dealership says they use Penzoil synthetic blend. What do you guys use on your 350's and G35's? I used to use Mobile 1 on my truck. Is it worth it? Lets discuss the brands, synthetic versus conventional, What does everyone think?

11-11-2005, 08:29 PM
I have used synthetic oils since 1973 and that was Amsoil. I have used Mobil One in vehicles for years now with no problems. I have heard bad stuff on Mobil One so was thinking about trying a different brand. I need to use the new 5-20W in my Mazda3 so it is harder to come by. What did you end up using?

11-11-2005, 10:23 PM
All newer car from th '90's up are designed with SYNTHETIC oil in mind... personaly I would not put anything else but synthetic in your car!

11-11-2005, 10:24 PM
Whoops... old thread... sorry!

Add your comment to this topic!