Silicon-free engine oil?

[Fulton 1]

I have an odd question.

I'm about to replace the high pressure fuel pump for my Cobalt LNF engine and the service manual indicates that "silicon-free engine oil", GM p/n 12345610, which I believe is just regular old GM Goodwrench 5w30, must be used to lubricate a few of the fittings.

Problem is that the closest dealer that stocks this stuff is a 45-minute drive from me. I'm looking at a VOA that someone posted for Pennzoil Ultra 5w30, which I have sitting around at my house, and it shows Si at 2 ppm. I realize that this is not technically silicon-free, but it is pretty close. I haven't been able to locate a VOA for the GM oil to compare.

Anybody have any insight on "silicon-free" oils? I'll make the trip to get the GM stuff is it's a big deal, but I might be over-thinking it...

Any input is appreciated. Thanks.

 

[ARCOgraphite]

Now that's esoteric!
Most ALL oils have a silicon compound to prevent foaming - I cant imagine a couple PPM (near undetectable) trace amount could any way possibly cause an issue. I Might imagine silicone grease would though ...

 

[scurvy]

They probably just meant to lubricate the fittings instead of installing them dry, but some overzealous editor just had to put in the special GM part number for bulk 5w30.

Use whatever engine oil you've got on hand. 2 ppm Silicon will do absolutely nothing harmful to the pump fittings.

 

[FL_Rob]

2 PPM is in effect silicone free,and by silicone free they're telling you to use petroleum based grease.

Ready for the flame.

 

[Tempest]

Originally Posted By: FL_Rob
2 PPM is in effect silicone free,and by silicone free they're telling you to use petroleum based grease.

Ready for the flame.


+1

Pretty much any formulated oil will have some silicon in it since it is used as an anti-foam agent.

As stated above, they want hydrocarbon based lube, not silicone based.

 

[Fulton 1]

Thank you all for the feedback. I'll just use the PU I have on hand.