Oldsragger

How many liters Oil is standard on a bbo oilpan? I have an un-orginal dipstick but its new and i guess it shows right. But anyway, i bought new Oil for the engine today, only 1 can, its Dynocat classic 20w-50 and 3,785liters. Will it be enought? Or should i buy one more can, if its to less for the engine..

400g block.

Thanks

pogo69

TripDeuces

Why 20W-50?

pogo69

I would never use a 20/50 myself either even for high performance....i would just use a straight weight

Oldsragger

Dont worry i will install the Oil filter as well
Well i use to fill up the filter before install.

Ok, i Will fill the oilcan i have then and check.. Think i fill 4liters last time with 15w40 diesel Oil.. The Level on oilstick show on the full mark.

Oldsragger

The dealer had 10w40 and 20w50, so i Just chose it. Since it says it will fit older engines and have high zink etc. I will not use the car when its cold or freezie outside. And i have oilpressure gauge to watch.

My oilpressure now on idle on cold engine is 5bar with the 15W40 diesel Oil (cheap brand but the high zink type) when i use it for just startup Oil. And i Will replace it again..



What Oil would you recommand anyway?

jaunty75

20W50 is too thick. Even the 15W40 might be. 10W40 or 10W30 is what you should use.

5 bar is about 75 psi, which I think is high for the oil pressure in these engines, and I think the reason you're getting pressures this high is exactly because you're using too thick an oil.

Drain what's in there out, put in 10W30 or 10W40, and have fun. These engines took 5 quarts assuming the oil filter was changed as well. If you put in 5 liters, that's about 5.3 quarts, a negligible difference. Alternatively, if you want to be closer, pour about 1/4 cup of oil out of your 5-liter container and pour the rest in the engine. Then you'll have put in 5.05 quarts, which is close enough in anybody's book.

Oldsragger

Hmm i thought older engines like thicker Oil too... Well i can always ask the seller if i can trade it back in with 10w40 instead then..

I have a highpressure oilpump type ,maybe thats why it shows good pressure

Here is the Oil i talking about.

rustyroger

You don't need more than 40psi hot oil pressure, and you are overloading the oil pump drive (and wasting power) with 20w50.
Thicker oil was for old fashioned loose clearance engines. It was specified for BMC front wheel drive cars because the transmission was effectively the oil pan, and the shearing effect of the gears rapidly degraded the oil.
In a classic British compromise neither the transmission or the engine got the right oil, but that's democracy for you!.

Roger.

Oldsragger

I have not check the Oil pressure yet on hot engine btw, only cold (5 bar) but good pressure is good pressure

I will go to the dealer today and change to 10w40,, and buy an extra can with oil so i have enought when filling, and with me in car..

Maybe thick Oil is for long mile engines instead too anyway. With bad pistonrings etc..

Thanks for tip Roger, hehe

Well its good to hear what ppl say on a olds forum about Oil type to use. Good i didnt open the 20w50 yet.

Oldsragger

Was no problemo to replace the 20w50 with 10w40, feel a little more safer now

pogo69

good decision

jaunty75

What are your oil pressure readings now?

People sometimes put thicker-than-recommended oil into their engines as a cheap, stop-gap measure to stop or slow oil leaks. But oil that's too thick doesn't circulate through the engine properly and can speed up the wear process.

Oldsragger

Have not change the Oil yet,maybe a little later today, will check the pressure when i will start engine again.

Ok i see, yeah i think so too. And since my engine have low miles after overhauling and bearings replaced i guess thicker Oil should not be nessasary.. Learning new stuff is good

MDchanic

Hey, Jaunty, if he can't get a quart measure in Norway, where is he going to find a ¼-cup measure?

- Eric

jaunty75

I thought of that. OK, he needs to pour off about 60 milliliters and then pour the rest into the engine.

Oldsragger

Lol, let me see if my mom have some measurment cans in the kitchen for it.

Each Oil can is 3.785 liters, almost 4L
So it should be about 4,4liters total i guess if taking away 60ml from a 5l can

rustyroger

A high reading on the gauge doesn't mean oil is getting to everywhere it's needed in sufficient quantity, particularly when cold.
A poor oil flow to the pistons or distributor drive will result in excessive wear, and the oil pump is driven by the distributor anyway, and the top of the engine may suffer too.
Thinner oils are much better for cold engines, and Oldsmobiles are designed to run with 5w30 to 10w40 oils. If you had your engine rebuilt at a good machine shop chances are the clearances are closer to ideal than when the car left the factory, simply because they can be machined to finer tolerances than back in the day.

5 bar is 75 psi, far more than your engine needs with nothing to be gained, and more load on the oil pump drive, and consequently the engine.

Roger.

Oldsragger

Ok i see, thanks, interesting to read..didnt know they could have about 5w30 but you say something that make me agree and understanding with it about clearence etc..

I have 3 x 5liters cans with castrol 0w30 Oil i got free from my work, but i dont think i can use that, the Oil is like water when its cold.. Lol... Its Oil special for new Volvo cars. And i dont think they need so much zink as olds engines from 68.

Yeah that sounds correct, i drain the Oil last evening and still see some grey color have got to the magnetic Oil plug, but it was not much.

Guess it comes from New bearings installed around..Some Oil shifts now in the beginning i think the engine will get cleaner with the time...

Guess i Will change the Oil every summer seasons at normal,

Its so bad summer here somethimes and i dont like to use the car if its rainy weather.. So will not use it so very much.

jaunty75

Just like in the human body, only up to a point. You need some blood pressure to stay alive, but too much causes all kinds of health problems. The same is true for your car. Too low an oil pressure is bad. Too high an oil pressure is bad.

Oldsragger

Yeah i guess so, but what is it with these high Flow or highpressure Oil pumps out they selling? I think in my building list it was installed a new highflow/pressure Oil pump if i remember right... I will check.... Remember my old 307 had about 4 bar in Oil press on cold engine.. If the gauge told the right numbers then..

jaunty75

4 bar is certainly better. That's about 60 psi cold. I put a gauge on the 425 in my '67 Delta 88, and when I start the engine cold, the pressure is about 45 to 50 psi. It drops after the engine warms up.

Oldsragger

I think i uses 10w40 Oil on the 307 that time i checked thw Oil pressure too.

Well i Will see when i starting up this engine next time and see what it will be cold and warm pressure.

Got the new filter installed with oil in, and filled up the engine too.
Time to set the timing now...

Cheerss

Oldsragger

Hello again, when we talk about the Oil pressure, i have very wrong sender.. it is from 0-160 ohm, and the sender i should have, is from 240-33ohm , lol,, so thats why the oil pressure (autometer gauge ) showns very wrong,...!


Cause when startup it showns 5bar..and on hot engine it shows 7bar, , and when give it throttle it goes back to around 5 bar..


soo, i buy the right sender to my Electric autometer gauge instead , expencive but Worth it.

Oldsragger

Have hooked up the correct oil pressure sender for my autometer gauge, tested just about 30sec this evening outside on idle.

Looks better or looks to low? Cold oil, 10w40. Will test more tomorrow with hot oil and driving.

jaunty75

The is no single magic number that the oil pressure should be, especially with a gauge that reads as imprecisely as yours does. It's about 2.5 bar, which is about 40 psi. Whether it's 40 or 39 or 41 or 38 or 43 doesn't matter. It's in the range it should be for a cold engine, and that's fine. The 10W40 oil is working exactly as it should. It's now time to stop checking it and worrying about it and just drive the car!

MDchanic

+1. 40 psi is probably the pressure valve blowoff setting.

Looks good.

- Eric

jaunty75

I rotated your photo so that we don't have to crane our necks to look at it.

Oldsragger

Thanks, lol sorry about that,
yeah it shows about 2.6-2.7bar ,its about 39-40psi when i calculate it in google. Good to not be confused with uncorrect gauges installed now

jaunty75

You don't really have to do this. 1 bar is 14.7 psi. Call it 15. Just multiply your bar reading by 15 to get psi. You can do this in your head. 1 bar = 15 psi. 2 bar = 30 psi. 2.5 bar = 37.5 psi. You get the idea!

Oldsragger

Aha i see,

73aussie455

Is that a Norwegian, Swedish or Chinese ant trapped in your gauge and did you have to pay extra for it?

Oldsragger

Actually its a spider ,lol i found it after the picture was taken. And i guess he is norwegian too. :P