I drive a 2004 Infiniti G35 and use synthetic oil. It burns a quart per 1,000 miles. This is rather expensive. If I switch back to conventional, will it burn less oil?

 

Short story YES, conventional is a larger molecule so it's harder to squeeze past work components.

Long story, words words, scientific theory with opintion, Google or search for posts here, debate ensues.

 

Just change it when recommended, check every other fill up. Convi is fine.

 

I have the same exact problem.
Next month in switching to conventional oil

 

Synthetic fluids run cooler and cleaner, there's no way in hell I'd ever go back to using conventional oil...regardless of cost!
Gary

 

It really isn't expensive it's just that I have to keep adding oil
It's only $26 for 5 gallon Mobil 1 fully synthetic

 

^^^

 

Take your pick.

Click Meeeee

 

Given the small sample size for nearly every oil and knowing absolutely NOTHING about each engine, including existing wear and driving conditions I would put zero stock into that thread.

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Gary, for as much as you are an advocate for OEM specs, it's funny that you won't use conventional even tho the VQ was designed to run on conventional. Nothing to do with cooler/cleaner, but more likely to do with valve clearances. It's no coincidence that everyone using synthetic has noticable valve ticking.

 

From my first oil change (1K miles) I've been using 5W/30 Mobil1 synthetic in SLICK'S engine and didn't begin using AMSOIL until she had 5K miles on her clock like they recommend! Valve noise, no that would worry the **** out of me!
Gary

 

I can confirm this in my car. She HATED Pennzoil Synthetic, engine sounded like butt. Promptly switched back to good ole Castrol conventional.