Technical 5W-30 vs 5W-40
- Thread starter BravoMark
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Technical 5W-30 vs 5W-40
PROV
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I wouldnt mix them but i can't see it doing too much harm. The 5w30 is for cars with a DPF, the 5w40 is cheaper and shouldnt be used in cars with DPFs (no problem at all putting 5w30 in a car without a dpf)
Ours started with 5w40 but ended up after one service with the 5w30...the following on it was back on 5w40 (which i will keep with)
Ours started with 5w40 but ended up after one service with the 5w30...the following on it was back on 5w40 (which i will keep with)
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since most people don't bother clicking the thanks button when they get a clear answer for their problem, I will do it for them 
Stongly disagree. The hold/hot viscosity rating has absolutely nothing to do with DPF suitability. Period!
What is required for Fiat diesel DPF fitted engines is minimum ACEA B3/B4 and API CF ratings.
examples
Fiat Selenia WR is 5W-40, ACEA B3/B4, API CF
Castrol (old) Tubo Edge Diesel is 5W-40, ACEA A3/B3/B4, API SL/CF
Castrol (new) Tubo Edge Diesel is 5W-40, ACEA C, API SM/CF
It just so happens that many fully synthetic oils are now 5W-30 and 0W-30 with required ACEA and API ratings.
Regarding mixing of near similar appropriate oils then this is not an issue. eg. Mixing 5W-30 with 5W40 is OK if your car is OK to run on a 5W30 or 5W-40 oil. Similary a 5W-40 part synthetic can be mixed with a 5W-30 or 5W-40 fully synthetic.
Part of all the rigorous testing and specification of lubricants is to ensure cross product and cross manufacturer compatibility and mixability.
What you should not mix are disimilar product, e.g, mineral & non meneral based oils. Also for a diesel engine with DPF then you would not want to mix a high ash content oil with a low ash content oil as this sill result in a higher ash content than is required.
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PROV
Member
I stand corrected, but was told that previously.
Fiat changed the spec on oil in the Bravo, in my handbook (2007) it says 5w40. In the handbook of 2008 onwards it recommends 5w30
Fiat changed the spec on oil in the Bravo, in my handbook (2007) it says 5w40. In the handbook of 2008 onwards it recommends 5w30
I am going with 5w-40 from Selenia. Although I read anything I could find regarding oil and was thinking of buying Castrol at first, but changed my mind since I got a good price on original Selenia. I found out some good reading regarding oil specifications and general recommendation. So if someone was thinking of different brand of oil or viscosity it is nice to get it clear in your head. It is written so it can be dead easy to understand.
What you guys forget is that the Euro5 (read: DPF) oils are Mid-SAPS, with less sulfated ash, phosphorus and sulfur to keep the DPF clean.
Without DFP, Fiat's recommended oil is Selenia WR, which is a "normal", semi-synthetic 5W-40 (SAE 5W-40, ACEA B3/B4, API CF, FIAT 9.55535-N2).
With DFP, it's Selenia WR Pure Energy, which is a fully synthetic, mid-SAPS 5W-30 (SAE 5W-30, ACEA C2, FIAT 9.55535-S1). In the newer Bravo manuals, this is the specification for all Diesel engines, DPF or not.
For the newest Euro 6 Bravos, it's Selenia WR Forward, which is a 0W-30 (SAE 0W-30, ACEA C2, FIAT 9.55535-DS1). It says that it can also be used with Euro5 engines, however there is literally no third-party oil that even mentions the specification, yet.
It's best to go by the Fiat specification numbers which are listed on most oils, not the weight. eni i-Sint FE and Motul Specific S1 are for example actually approved as FIAT 9.55535-S1 (as opposed to "Meets/exceeds specification of" which is printed on everything anyways), and as it's the only specification besides API and ACEA on both oils, they're likely developed specifically for Fiat Multijet engines.
As far as the "manufacturer says it also meets the specifications" fraction goes:
- Aral HighTronic J
- Castrol Magnatec (Professional) 5W-30 C2
- Fuchs TITAN GT1 PRO C-2
- Liqui Moly Top Tec 4200 and 4300
- Meguin Compatible and Fuel Economy 5W-30
- Motul 8100 Eco-clean 5W-30
- Shell Helix Extra
- Total Quartz Ineo ECS
- Valvoline Synpower ENV C2
It also states that you should not mix C2 oils with non-C2 oils.
Without DFP, Fiat's recommended oil is Selenia WR, which is a "normal", semi-synthetic 5W-40 (SAE 5W-40, ACEA B3/B4, API CF, FIAT 9.55535-N2).
With DFP, it's Selenia WR Pure Energy, which is a fully synthetic, mid-SAPS 5W-30 (SAE 5W-30, ACEA C2, FIAT 9.55535-S1). In the newer Bravo manuals, this is the specification for all Diesel engines, DPF or not.
For the newest Euro 6 Bravos, it's Selenia WR Forward, which is a 0W-30 (SAE 0W-30, ACEA C2, FIAT 9.55535-DS1). It says that it can also be used with Euro5 engines, however there is literally no third-party oil that even mentions the specification, yet.
It's best to go by the Fiat specification numbers which are listed on most oils, not the weight. eni i-Sint FE and Motul Specific S1 are for example actually approved as FIAT 9.55535-S1 (as opposed to "Meets/exceeds specification of" which is printed on everything anyways), and as it's the only specification besides API and ACEA on both oils, they're likely developed specifically for Fiat Multijet engines.
As far as the "manufacturer says it also meets the specifications" fraction goes:
- Aral HighTronic J
- Castrol Magnatec (Professional) 5W-30 C2
- Fuchs TITAN GT1 PRO C-2
- Liqui Moly Top Tec 4200 and 4300
- Meguin Compatible and Fuel Economy 5W-30
- Motul 8100 Eco-clean 5W-30
- Shell Helix Extra
- Total Quartz Ineo ECS
- Valvoline Synpower ENV C2
It also states that you should not mix C2 oils with non-C2 oils.
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If they used the 5-30 it is ok as it is a bit more "fluid" and goes a bit faster through the engine to lubricate the engine a bit faster than 5-40 due to its viscosity.As someone said here before Fiat has changed the specs and now they recommend 5-30.
