Anyone put a Engine Pre-Oiler on their car

[DougS550]

Hi. Has anyone installed a Pre-Oiler system on their engine. I am going to make a kit which will supply oil pressure to the engine to about 40psi before allowing the starter circuit to start the engine. It will also activate and supply oil pressure to the engine during emergency or sudden loss of oil pressure. Thank you for your help

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[Zooks527]

Well, if you want to pre-oil it, just hold the gas pedal to the floor while you crank it over. Most FI cars USED TO kill the injectors when the pedal is held to the floor before starting, but it no longer seems to be a universal condition. However, it continues to work in an S550 Mustang.

I have tried it in both my 2019 Mustang GT and my 2005 Toyota Tacoma. For the Mustang, with both clutch and gas to the floor, the engine just cranks over, bringing up the oil pressure but not firing until I take my foot off the gas. Other posts below show other Mustangs behaving the same way. For the Tacoma, however, with the gas to the floor the engine turns over for a moment, then fires and goes to high revs immediately.

 

[Kleiss1]

Well, if you want to pre-oil it, just hold the gas pedal to the floor while you crank it over. Most (all?) FI cars these days kill the injectors when the pedal is held to the floor before starting.

I didn’t know that. My ‘18 GT is setting in the garage now until I get another warmer day In a week or so. Seems like a good idea to crank it a little after not running for a few weeks.

 

[DougS550]

Well, if you want to pre-oil it, just hold the gas pedal to the floor while you crank it over. Most (all?) FI cars these days kill the injectors when the pedal is held to the floor before starting.

Good theory, I will test on my Mustang. Never new they did this. Thank you

 

[Rapid Red]

Well, if you want to pre-oil it, just hold the gas pedal to the floor while you crank it over. Most (all?) FI cars these days kill the injectors when the pedal is held to the floor before starting.

Nice one, just thinking about this very thing. My car sits for some extended time, I'll spin it before starting. Having the oil pressure gage is helpful. As one can see full pressure and know the motor is lubed.

Other 2 have individual starter and ignition. Mustang's one button does all, had me scratching my head some.

Thanks zook527

Gary, it is a good practice, knowing the engine is oiled.
A standard practice for radial engines... some history

 

[WildHorse]

Gary, it is a good practice, if for no other reason, knowing the engine is oiled.

It's always oiled, whether you start it or not. The 1/4 second or so it takes the oil pressure to get to 20 psi will cause next to zero wear.

 

[Rapid Red]

It's always oiled, whether you start it or not. The 1/4 second or so it takes the oil pressure to get to 20 psi will cause next to zero wear.

Ok, I'll take your word for it, still going to spin a dry motor . Cold start, watching the oil pressure.

I'm seeing a bit more than 20psi. Until it idles back, and seems to be a bit more than a 1/4 sec.

shrug

 

[DougS550]

Good theory, I will test on my Mustang. Never new they did this. Thank you

I tried holding the glass pedal down all the way on my FI cars and it started like normal. I think they all have electronic gas pedals now. Mustang not here but don't think it will start any differently.

 

[ice445]

Modern synth oils cling to surfaces for a really long time, so starts aren't really "dry" in the true sense of the word unless it's been sitting many months. And even then gravity saves the main bearings for last.

 

[Rapid Red]

Modern synth oils cling to surfaces for a really long time, so starts aren't really "dry" in the true sense of the word unless it's been sitting many months. And even then gravity saves the main bearings for last.

Sounds good, and that's the hype, not disparaging your post to be clear.

Just old enough to know that sometimes new and improved falls short some.

Reading a statement aren't really dry, implies isn't really wet.

Being sarcastic.... so will continue to spin my isn't really dry - not really wet motor.

Got to be one or the other, what's to loose? LMAO

 

[Zooks527]

I didn’t know that........

Good theory, I will test ...........

Nice one, ........

Please see updated post #2.

I tried holding the glass pedal down all the way on my FI cars and it started like normal. I think they all have electronic gas pedals now. Mustang not here but don't think it will start any differently.

Yes. Following your post, I went out and tried it in my truck. The ECU logic appears to have changed, at least in that one. I have corrected post #2 as a result. I will also update #2 after I try it on my Mustang.

 

[NoVaGT]

If starting your engine normally was a problem, we'd know by now. It's been decades.

Just relax. Stop obsessing. Just enjoy driving your car.

If you can't stop obsessing, devise a way to change the oil in 2 minutes. Some sort of E-Z drain system. That way you can change your oil every time you drive the car, and never have to worry about your motor.

 

[NoVaGT]

Please see updated post #2.


Yes. Following your post, I went out and tried it in my truck. The ECU logic appears to have changed. I have corrected post #2 as a result.

Try it on your Mustang, not your truck.

 

[J17GT]

I tried holding the glass pedal down all the way on my FI cars and it started like normal. I think they all have electronic gas pedals now. Mustang not here but don't think it will start any differently.

I can tell you 100% that my 2017 will not start if I hold the gas pedal to the floor before hitting the starter button. It will just crank and crank. I do this after it sits in storage for the winter prior to the first start. I do two crank cycles with my foot the floor. Then on the third I start it like normal. No valve clatter or anything, just a smooth cold start with basically instant oil pressure.

I do the same routine after an oil change too.

All of my other fords have operated the same way. 1998 Mustang GT, 2003 F150, 2007 Explorer, 2011 F150.

 

[Zooks527]

Try it on your Mustang, not your truck.

The Mustang has been sitting for 4 days and is fully cold soaked. It did it on my truck, because my truck was fully warm and oily after driving to work. I'll give the Mustang a try next time I have it out on the road.

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