When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
Doing the oil change jacking up the car will not drain all the oil and the safe procedure when refilling is to add only 8 qts and let the oil circulate a few minutes before measuring with the electronic sensor. I do my oil changes using a lift and first drain the engine sump (2-3 quarts) then the side holding tank. I refill with 8 quarts and idle the engine and maybe add another qt to reach 1 bar below max. It is bad to overfill any Porsche engine as that defeats the purpose of having a dry sump lubrication system.
Can you elaborate? The purpose of dry sump is to always have available oil in the holding tank which can be pumped, irrespective of g-forces which would cause oil to slosh around in a wet sump system and potentially starve the pump(s). I'm not advocating overfilling, but how would doing so defeat the purpose of a dry sump?
Doing the oil change jacking up the car will not drain all the oil and the safe procedure when refilling is to add only 8 qts and let the oil circulate a few minutes before measuring with the electronic sensor. I do my oil changes using a lift and first drain the engine sump (2-3 quarts) then the side holding tank. I refill with 8 quarts and idle the engine and maybe add another qt to reach 1 bar below max. It is bad to overfill any Porsche engine as that defeats the purpose of having a dry sump lubrication system.
You're overthinking it. Drain the oil, level the car if you aren't already level, refill below max and verify. Add oil as necessary so you're between min-max.
I've been doing my oil change for almost 10 years now. It's always the same, 9.5 quarts-
*And my S3 always takes 6 quarts-
There was one time when I lifted the front of the GT3 and left it for hours to get more oil out-I can't recall exactly if it took 10 quarts or something, but in my experience, normal draining with the car flat on the ground, after the new filter is in, drain plugs back on, 9.5 quarts, perfect every time.
JB
@ 8lug, the reason why you never want to overfill with oil is that liquid oil is non-compressible so if there is too much oil it will force its way pass any seals or in the case of air cooled 911's the oil gets blown out of the engine in a huge cloud of smoke. A friend of mine took a 1977 911 for an oil change at his local garage whose mechanic was not knowledgeable about how to measure the oil level in the 911 (done on level ground with engine idling). The car was overfilled and I got a frantic call about his car blowing smoke in copious amounts to kill off any mosquitos and (people) that had to breath in that emission.The way the dry sump system is supposed to work is there are several scavenger pumps in the engine that vacates the oil in the sump to put it back into the reserve separate oil tank from which another pump delivers that oil under pressure to wherever it is needed. So if there is too much oil in the holding tank then the sump will be overfilled instead of dry.
@ 8lug, the reason why you never want to overfill with oil is that liquid oil is non-compressible so if there is too much oil it will force its way pass any seals or in the case of air cooled 911's the oil gets blown out of the engine in a huge cloud of smoke. A friend of mine took a 1977 911 for an oil change at his local garage whose mechanic was not knowledgeable about how to measure the oil level in the 911 (done on level ground with engine idling). The car was overfilled and I got a frantic call about his car blowing smoke in copious amounts to kill off any mosquitos and (people) that had to breath in that emission.The way the dry sump system is supposed to work is there are several scavenger pumps in the engine that vacates the oil in the sump to put it back into the reserve separate oil tank from which another pump delivers that oil under pressure to wherever it is needed. So if there is too much oil in the holding tank then the sump will be overfilled instead of dry.
Yes, I understand the reasons for not overfilling, I just didn't understand the connection you were making to defeating the purpose of the dry sump system. It does nothing to defeat it, the dry sump system still functions the same way, except you still have same problems you would in an overfilled wet sump.
I know a guy who took his 996 Turbo to a "reputable" indie and they overfilled the thing by about 1 quart 😳
I would have drained a bit from the crank case right there on the side of the road, a cloud of oil was floating out of the exhaust at idle-we were at a cafe when he cranked the car and said the level indicator was at the top 🤦♂️
If I could remember the name of the shop I'd name it, complete incompetence-
When I want to kill mosquitos I crank up my two stroke triple 👹
I was going to order some Femco oil drain valves, but they offer multiple thread lengths. Does anyone know the thread length on the two engine oil drain bolts?
A word to anyone thinking of using this pan to do your oil change. "DON'T DO IT"
You will have oil all over the place. It's quite possibly the worst design for an oil pan ever.
The oil must first drop on that top floor then make its way to the drain hold and fall into the collection area below. The two problems with this is:
1. When the oil drain plug is pulled, the oil comes out so fast that it actually hits that top floor and make an additional jump right out of the pan.
2. Then top area fills up faster than it can transfer the fluid below which will cause the oil to overflow onto your garage floor.
That pan is a giant mess.
Sorry Brian, but you've had to run into this issue especially when dropping the tank oil.
Just supervised my teenage kid doing my GT3 oil change.
Ive used the same GarageBoss 12qt oil catch can for >20 years. No issues.
GarageBOSS GB150 12.5 Quart Oil Drain Pan with Funnel https://a.co/d/0cOU2xjL
I use a drip tray as backup but I cant remember ever cleaning the drip tray.
That Lumax 15qt drainmaster oil catch does indeed have some bad reviews.
You guys have a lot of interesting alternatives for oil catch cans.
We did convert to the Stahlbus M20 x 1.5 x 2 thanks to this thread. Excited to have an even easier time next time!
05-04-2023, 09:57 PM
