Any harm in switching from 10w40,to 5w40 in a 30year old car that has always had 10w40? Just thinking that the 5w40 would flow quicker when cold which might prevent future wear on this older Engine.Engine has 50,000 miles on it and doesn't use any oil.Or should i just stick to the 10w40,What would you recommend? Thanks in advance for your input.
Switching from 10w40 to 5w40
- Thread starter Ether
- Start date
How cold?
If you're not even getting down to freezing, I'd say the 10W40 and 5W40 are going to be pretty similar on starts.
I don't think the 5W40 would cause you problems, but why change if you're not having any problems and there is not likely to be any benefit?
I don't think the 5W40 would cause you problems, but why change if you're not having any problems and there is not likely to be any benefit?
I'd consider SAE 30 even if 8°C is the lowest you'll see.
Thanks for the responses.I am thinking out loud with regard to the 5w,or 10w.The 10w40 is a semi synthetic,and the 5w40 is a synthetic and it was suggested to me that the synthetic 5w40 would give better protection in this older Engine,i have both oils to hand,but i can see that it's splitting hairs between the two oils.These are the Technical data sheets for each product,not much difference as the 5w40 appears to be quite a thick one.
http://www.total-distributor-partners.com/media/15337/quartz_7000_10w-40_-_08.2013.pdf Total have said that this is now API SN,and the pour point is -42,not -24.
http://www.total-distributor-partners.com/media/15252/quartz_9000_5w-40_-_08.2013.pdf
http://www.total-distributor-partners.com/media/15337/quartz_7000_10w-40_-_08.2013.pdf Total have said that this is now API SN,and the pour point is -42,not -24.
http://www.total-distributor-partners.com/media/15252/quartz_9000_5w-40_-_08.2013.pdf
I run 0w-40 in 30+year old engines engines specced for 10w40. Works perfectly. (As is to be expected.) Any 5w-40 would work, too...
The total 5w-40 you mention carries MB 229.3 and Porsche A40 approvals. It can't be a bad oil and is a LOT better than anything that was available when your car was built...
The total 5w-40 you mention carries MB 229.3 and Porsche A40 approvals. It can't be a bad oil and is a LOT better than anything that was available when your car was built...
Last edited:
Originally Posted By: Ether
Thanks for the responses.I am thinking out loud with regard to the 5w,or 10w.The 10w40 is a semi synthetic,and the 5w40 is a synthetic and it was suggested to me that the synthetic 5w40 would give better protection in this older Engine,i have both oils to hand,but i can see that it's splitting hairs between the two oils.These are the Technical data sheets for each product,not much difference as the 5w40 appears to be quite a thick one.
http://www.total-distributor-partners.com/media/15337/quartz_7000_10w-40_-_08.2013.pdf Total have said that this is now API SN,and the pour point is -42,not -24.
http://www.total-distributor-partners.com/media/15252/quartz_9000_5w-40_-_08.2013.pdf
I think there is some misunderstanding about pour point for recent Q7000 10W-40.
Specification from 2015.
http://catalog.lubricants.total.com/gallery/ORIGINALS/visuels/6500/6815
Pour point still -24 C.
***
It is known that Total had changed formulation (like others) over the years/decades.
Back in the 2004. it was different oil
http://www.lubadmin.com/upload/produit/FichePDF/lang_23/1172.pdf
***
Btw, go for Q9000 5W-40. Better oil (longer OCI) for slightly more money.
Thanks for the responses.I am thinking out loud with regard to the 5w,or 10w.The 10w40 is a semi synthetic,and the 5w40 is a synthetic and it was suggested to me that the synthetic 5w40 would give better protection in this older Engine,i have both oils to hand,but i can see that it's splitting hairs between the two oils.These are the Technical data sheets for each product,not much difference as the 5w40 appears to be quite a thick one.
http://www.total-distributor-partners.com/media/15337/quartz_7000_10w-40_-_08.2013.pdf Total have said that this is now API SN,and the pour point is -42,not -24.
http://www.total-distributor-partners.com/media/15252/quartz_9000_5w-40_-_08.2013.pdf
I think there is some misunderstanding about pour point for recent Q7000 10W-40.
Specification from 2015.
http://catalog.lubricants.total.com/gallery/ORIGINALS/visuels/6500/6815
Pour point still -24 C.
***
It is known that Total had changed formulation (like others) over the years/decades.
Back in the 2004. it was different oil
http://www.lubadmin.com/upload/produit/FichePDF/lang_23/1172.pdf
***
Btw, go for Q9000 5W-40. Better oil (longer OCI) for slightly more money.
Last edited:
In most cases a full synthetic 5W40 is a better oil than a semi-synthetic 10W40. The 5W40 you are looking at carries many good OEM approvals from BMW, MB & Porsche. It should work fine for you.
I often switch between a 10W40 semi-synthetic and a 0W40 or 5W40 full synthetic in my Opel. It just depends on what is the best sale price at the time.
I often switch between a 10W40 semi-synthetic and a 0W40 or 5W40 full synthetic in my Opel. It just depends on what is the best sale price at the time.
Last edited:
My previous car was a MK3 VW Jetta that I bought new in '97, for a few years I ran 15w40 and 10w40 in it and then switched to 5w40 and ran that oil till it was 17 years old when I traded it in with trouble free 375K km on it. No leaks or burning oil. When I replaced valve cover gasket at about 300K km the valve train was clean, very clean.
Originally Posted By: Ether
...5w40 would flow quicker when cold which might prevent future wear on this older Engine...
Fully agreed! Even 0W40 proposed - keep on eye on viscosity at 100C, avoiding low oil pressure at operating temperature.
My example: 2 years ago the 17 years old S60 switched from (semi-synthetic) Castrol Magnatec 10W40 to (synthetic) Mobil1 0W40 and different kind of 5W40 oils for better cold flow and cleaning out of sludge/varnish from my high mileaged engine. Only negative effect: 1 quart oil burning at 6K miles OCI.
My next try will Total QE 9000 5W40 for 6K miles OCI.
...5w40 would flow quicker when cold which might prevent future wear on this older Engine...
Fully agreed! Even 0W40 proposed - keep on eye on viscosity at 100C, avoiding low oil pressure at operating temperature.
My example: 2 years ago the 17 years old S60 switched from (semi-synthetic) Castrol Magnatec 10W40 to (synthetic) Mobil1 0W40 and different kind of 5W40 oils for better cold flow and cleaning out of sludge/varnish from my high mileaged engine. Only negative effect: 1 quart oil burning at 6K miles OCI.
My next try will Total QE 9000 5W40 for 6K miles OCI.
Last edited:
+1
Btw, VOA Q9000 Energy 5W-40 from Oil-Club.ru
http://www.oil-club.ru/forum/topic/12201-total-quartz-9000-energy-5w-40-svezhee/
Btw, VOA Q9000 Energy 5W-40 from Oil-Club.ru
http://www.oil-club.ru/forum/topic/12201-total-quartz-9000-energy-5w-40-svezhee/
Reviving an old thread.
Just made the switch from 10W-40 to 5W-40 Myself.
I was using Valvoline Maxlife 10W-40 Syn-Blend and have switched to Total Quartz 9000 5W-40.
I've been driving it around for 3 days now with no catastrophic engine failure so far lol.
If anything, the lifters sound a little less tappy when cold, warm about the same.
I was a little scared about putting a Full synthetic oil in a 32 year old engine that has seen nothing but Dino or Semi Synthetic oils in the past and has over 100k miles, and doesn't burn any oil and only leaks a teeny amount from the distributor / cylinder head seal ( it's horizontally mounted ).
I think it'll be ok, it's an A3/B4, Porsche A40 certified oil and is on the thick end for a 5W-40 ( 14.7cst @100c )
Will post if something disastrous happens
Just made the switch from 10W-40 to 5W-40 Myself.
I was using Valvoline Maxlife 10W-40 Syn-Blend and have switched to Total Quartz 9000 5W-40.
I've been driving it around for 3 days now with no catastrophic engine failure so far lol.
If anything, the lifters sound a little less tappy when cold, warm about the same.
I was a little scared about putting a Full synthetic oil in a 32 year old engine that has seen nothing but Dino or Semi Synthetic oils in the past and has over 100k miles, and doesn't burn any oil and only leaks a teeny amount from the distributor / cylinder head seal ( it's horizontally mounted ).
I think it'll be ok, it's an A3/B4, Porsche A40 certified oil and is on the thick end for a 5W-40 ( 14.7cst @100c )
Will post if something disastrous happens
Escort oil change by Lauri Lind, en FlickrSimilar threads
- Locked