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| oil filter https://slantsix.org/forum/viewtopic.php?t=38566 |
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| Author: | thedeputy [ Sat Jan 09, 2010 9:38 am ] |
| Post subject: | oil filter |
What's a good oil filter for my 75 225? It's going to be used regularly but no more tha 4000 miles a year. I plan on using 20w50 oil. I asked at a auto store today and they had two, one had a relief valve which opened at 1 bar, and in the other filter the relief valve opened up at 2,5 bar. so which one is better? Thanks, Antoon |
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| Author: | GTS225 [ Sat Jan 09, 2010 10:10 am ] |
| Post subject: | |
Hmmmm......1 BAR is equal to 14.7psig at sea level, so one opens at about 15 psi, and the other opens at about 35 psi. I suspect this relief valve spec is actually the bypass valve setting, which translates to when the valve opens and allows unfiltered oil to run through the engine. (This also relates to how often one changes out the filter.) I think I'd go with the 2.5bar filter, but I'm no expert/engineer. Just so long as it's NOT a Fram brand. Roger |
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| Author: | Joshie225 [ Sat Jan 09, 2010 10:41 am ] |
| Post subject: | |
We've gone over this many times. About oil viscosity, filter selection and more. 20W-50 is too thick for just about anywhere. 10W-30 is a better choice in most all cases. Wix makes good filters so does Purolator. |
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| Author: | SlantSixDan [ Sat Jan 09, 2010 2:16 pm ] |
| Post subject: | |
Probably the easiest good-quality filter of the correct size for you to get in Europe is a Mann #940/4. 20w50 oil is far too heavy. 5w30 or 5w40 is much more appropriate, and if you are using the car in extremely cold conditions, use 0w30 or 0w40. |
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| Author: | thedeputy [ Sun Jan 10, 2010 1:16 am ] |
| Post subject: | |
Ok thanks. I think I'll go with the mann 940/4. About the oil, I've always been under the impression that the old mopars all needed the 20w50 oil, especially in a high milage motor. Antoon |
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| Author: | emsvitil [ Sun Jan 10, 2010 1:29 am ] |
| Post subject: | |
How much mileage? If it's really high, I'd go with a diesel 15w40 oil............. |
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| Author: | thedeputy [ Sun Jan 10, 2010 4:03 am ] |
| Post subject: | |
100000 miles |
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| Author: | FrankRaso [ Sun Jan 10, 2010 5:43 am ] |
| Post subject: | |
Many 0W-30 engine oils are often thicker when hot than straight 30-weight oils. Shell Rotella T 30, for example, has a hot (100°C) viscosity of 10.9 cSt. Castrol Syntec 0W-30 has a 100°C viscosity of 12.1 cSt. Chevron Delo 400 0W-30 has a 100°C viscosity of 10.3 cSt. Esso XD-3 Extra 0W-30 has a 100°C viscosity of 12.2 cSt. Mobil 1 0W-30 Advanced Fuel Economy has a 100°C viscosity of 11.0 cSt. Although the Service Manual does specify 20W-50 in 1975, I would also try a 15W-40 Heavy Duty Engine Oil first if a thick oil is really required. If the oil is too thick, the pump will develop enough pressure to cause the relief valve to bypass oil back to the sump. Excess pressure doesn't do the pump's drive gear any favours either (see SL6 Oil Pump Gear Failure and Oil System Information). |
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| Author: | thedeputy [ Sun Jan 10, 2010 5:44 am ] |
| Post subject: | |
Ok, that's some good info. Thanks, Antoon |
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