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| high viscosity non synthetic oil https://www.ausmini.com/forums/viewtopic.php?f=2&t=48707 |
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| Author: | bigjobs [ Fri Dec 26, 2008 12:59 pm ] |
| Post subject: | high viscosity non synthetic oil |
i need to boost oil pressure at operating temp. i have looked at Penrite HPR 40 25w-70 and i think it is a non synthetic / full mineral oil but can't tell for sure. anyone know for sure? or of an alternative high viscosity oil? currently running Pennzoil non synthetic 25w-60 |
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| Author: | feralsprint [ Fri Dec 26, 2008 1:22 pm ] |
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Mate just changing the grade of oil is not going to stop the oi; pressure problem if it is low, you already are running a higher grade then normal and by increasing the grade is making the oil to heavy for the syncro's in the gerabox to work properly, what oil pressure are you running now penrite started using a lesser base oil a couple of years back and started adding friction modifiers to make up for it so it is not a good oil for old worn engines |
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| Author: | bigjobs [ Fri Dec 26, 2008 1:38 pm ] |
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at operating temp it's running about 40 -50 at the moment. it's only a little bit extra i am looking for. my engine would be no worse than plenty of others i have seen in terms of oil pressure. |
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| Author: | drmini in aust [ Fri Dec 26, 2008 2:37 pm ] |
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Try Castrol Edge Sport 25W/50, or KMart's KMX 20W/50. I get 70psi hot with both. I found Penrite HPR30 and 40 both lost pressure when real hot. 50psi is OK at revs, hot, if less though the motor probably needs bearings/crank grind and/or a new oil pump. |
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| Author: | Timbo [ Fri Dec 26, 2008 7:34 pm ] |
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If you go to high a viscosity you'll get clutch drag caused by the primary gear sticking to the crank shaft. Put some Wynns Stop Smoke in there if you want to see what happens. Tim |
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| Author: | drmini in aust [ Fri Dec 26, 2008 7:38 pm ] |
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Timbo wrote: If you go to high a viscosity you'll get clutch drag caused by the primary gear sticking to the crank shaft. Put some Wynns Stop Smoke in there if you want to see what happens.
Tim Been there done that, one night we put Penrite 40W/70 in my son's oil burner Clubby and we couldn't get gears.. 
Of course he just HAD to go out immediately, the old hot date excuse...  so I drained a litre or so out and replaced it with diesel fuel. Motor needed a cleanout anyway. 
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| Author: | 9YaTaH [ Sat Dec 27, 2008 9:44 am ] |
| Post subject: | Dates |
drmini in aust wrote: Timbo wrote: If you go to high a viscosity you'll get clutch drag caused by the primary gear sticking to the crank shaft. Put some Wynns Stop Smoke in there if you want to see what happens. Tim Been there done that, one night we put Penrite 40W/70 in my son's oil burner Clubby and we couldn't get gears.. Of course he just HAD to go out immediately, the old hot date excuse... so I drained a litre or so out and replaced it with diesel fuel. Motor needed a cleanout anyway. I worry about you sometimes Doc 
I hope you flushed out the concoction soon after the hot date
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| Author: | drmini in aust [ Sat Dec 27, 2008 9:59 am ] |
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Left it in for a week... Changed it again with 20W/50, but shortly after the car had a headon on Peter Meadows Rd near Kentlyn. It's now gone to the big graveyard in China (steelworks).
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| Author: | NAV [ Sat Dec 27, 2008 10:03 am ] |
| Post subject: | |
drmini in aust wrote: Been there done that, one night we put Penrite 40W/70 in my son's oil burner Clubby and we couldn't get gears..
Of course he just HAD to go out immediately, the old hot date excuse... so I drained a litre or so out and replaced it with diesel fuel. Motor needed a cleanout anyway. So if i wanted to clean the inside of my motor how much diesel should i use in how much oil? |
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| Author: | drmini in aust [ Sat Dec 27, 2008 10:29 am ] |
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I don't recommend using diesel or flushing oils as they can dislodge crud, which could then find its way into places you don't want. Like bearings... I only did this coz I had no other quick option on a Friday night. If the oil is black and crappy, just buy 2 cans of cheapo 20W50, do a couple of oilchanges at 500 mile intervals and then toss the filter for a new one. And new oil... KMart's KMX 20W/50 is hard to beat, IMO. |
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| Author: | simon k [ Sat Dec 27, 2008 11:51 am ] |
| Post subject: | Re: high viscosity non synthetic oil |
bigjobs wrote: i need to boost oil pressure at operating temp.
i have looked at Penrite HPR 40 25w-70 and i think it is a non synthetic / full mineral oil but can't tell for sure. anyone know for sure? or of an alternative high viscosity oil? currently running Pennzoil non synthetic 25w-60 check into the 9/16 ball bearing oil pressure relief valve mod
http://www.ausmini.com/forums/viewtopic.php?t=46507&highlight=ball |
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| Author: | NAV [ Sat Dec 27, 2008 6:53 pm ] |
| Post subject: | |
drmini in aust wrote: I don't recommend using diesel or flushing oils as they can dislodge crud, which could then find its way into places you don't want. Like bearings...
I only did this coz I had no other quick option on a Friday night. If the oil is black and crappy, just buy 2 cans of cheapo 20W50, do a couple of oilchanges at 500 mile intervals and then toss the filter for a new one. And new oil... KMart's KMX 20W/50 is hard to beat, IMO. It was only a thought as NAV's engine has been sitting for a bit with old oil in it. I've only used Castrol GTX2 since it's rebuild as a well known mini builder recomended it to me and he swears by it. |
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| Author: | minidrifter [ Sat Dec 27, 2008 7:07 pm ] |
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i was reading castrols books today at work, and they recommend gtx original for older minis, gtx2 is used for post 1990's cars, same viscosity, yet gtx pre 1990, gtx2 post 1990. |
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