3.5v6 oil - Chrysler 300C Forum: 300C & SRT8 Forums
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post #1 of 8 (permalink) Old 02-01-2017, 02:42 PM Thread Starter
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3.5v6 oil

Hi,

Relatively new but lookin to run an oil question passed you guys.

My 3.5 LPG is a lovely motor. Fully serviced and looked after by previous owner with 25k on it (now 33). All belts swapped and put castrol 5 30 in it. As it's so rare over here advice is difficult.

It seems to have drunk the castrol 2.5l over 6k. Pcv changed but wondering about the oil.

Mobil 1 ESP 5w30. Seems to have highest flash point I can find but as ever technically doesnt meet ms6395? Is it suitable for the beast?

Any suggestions?
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post #2 of 8 (permalink) Old 02-01-2017, 05:50 PM
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Both castrol and Mobil One are great oils but you'll go thru more Mobil One oil then you ever did castrol, i would try adding some marvel mystery oil to your engine to clean up the rings. or if you have a extra bottle of atf laying around poor that in a few days before your next oil change that's the budget way of cleaning up your engines internals. Thanks Dad..
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post #3 of 8 (permalink) Old 02-06-2017, 07:45 AM Thread Starter
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Well ordered 10l mobil 1 ESP and a k&n oil filter. Let's see what happens :s
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post #4 of 8 (permalink) Old 02-07-2017, 08:12 AM
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For a Mobil1 equivalent spec you might try GM Dexos2 available from Vauxhall dealers at half the price. I have used this successfully in my CRD but have now switched to an even cheaper genuine MB oil sourced via fleabay.
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post #5 of 8 (permalink) Old 02-07-2017, 08:26 AM Thread Starter
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For a crd I'd be less bothered as it's widely available with lots of alternatives.

3.5 calls for 10w30 which is as rare as over this neck of the woods and it appears even American brands of Mobil etc are different on this side of the pond. As for running Mopar oil it's a semi by the looks and I am aiming for something readily available.

Anyhoooo I'll throw the m1 ESP which seems to have the highest flashpoint of anything I can find in and see how she goes.
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post #6 of 8 (permalink) Old 02-07-2017, 01:48 PM
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5W30 has a wider temperature operating range than 10W30 so should be a superior oil, assuming other relevant specifications are met or exceeded. Although my Audi A4 originally specified 10W30, I have been using 5W30 for several years with no problems. Starting is much improved in sub-zero temps. Have you checked your Owners Manual to check for any alternative grades of oil acceptable?
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post #7 of 8 (permalink) Old 02-07-2017, 02:31 PM Thread Starter
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Moochose thanks for reply. Yes, owners manual states 5w30 may be used in colder climates. UK isn't cold enough to officially fall into that range but any oil is better than none.

It says it should meet the relevant acea and API specs plus the Chrysler ms standard. I suppose it's just one of those things - I'm going for the best quality I can find. The odd thing is the old rover engines (k series) that I'm used to happily run on cheap semi with 0 usage - sure made things easier.
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post #8 of 8 (permalink) Old 03-20-2017, 02:42 PM Thread Starter
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Just an update 1k miles and I've topped up about 250ml seems to be approx 50% less than castrol.

Seems to confirm that the v6 has a breathing problem in my opinion especially after seeing a slightly oily plenum/TB. Pcv replaced etc

I imagine that means on the gloop ran in USA it may be better behaved. Emissions are good with HC 1ppm, CO in negative values on LPG so it must be cleanly burning this dribble off.
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