Is it ok to have changing oil viscosities?

[StockEngine]

Is the Petron HTP (High Temp Protection) Fully Synthetic range any good? They have Rev X HTP 5w40 diesel oil (~P450/L) and Blaze Racing HTP 0w40 gasoline engine oil (~P602/L). Their oils are supposedly made from PAO (polyalphaolefin) Grp IV base oil, same as Mobil 1.

as long as it meets your engine requires. no engine spec ever required PAO.

[diehard]

as long as it meets your engine requires. no engine spec ever required PAO.

I’m trying out Petron Rev X HTP on my Kia Carnival hoping for better protection for the turbo during long provincial drives. That plus I prefer to buy motor oil from LazMall accredited vendors in Lazada to ensure the product I buy is genuine...dami fake sa Lazada.

On a side note, how come Shell diesel oils are only rated CF, even their TOTL Ultra 5w40? They are ACEA A3/B3 A3/B4 compliant but only API CF rated.

[StockEngine]

I’m trying out Petron Rev X HTP on my Kia Carnival hoping for better protection for the turbo during long provincial drives. That plus I prefer to buy motor oil from LazMall accredited vendors in Lazada to ensure the product I buy is genuine...dami fake sa Lazada.

On a side note, how come Shell diesel oils are only rated CF, even their TOTL Ultra 5w40? They are ACEA A3/B3 A3/B4 compliant but only API CF rated.

there are two kinds of oils.. diesel engine oils and gas specific oils..

[diehard]

there are two kinds of oils.. diesel engine oils and gas specific oils..

Shell has Helix Ultra for gasoline engines (0w40, 5w30, 5w40) and Shell Helix Ultra Diesel 5w40. Shell Helix Ultra Diesel is rated API CF, ACEA A3/B3, ACEA A3/B4. Most modern diesel engines require at least API Ci-4 which in turn has already been superseded by CJ-4 and CK-4. Which is why I wonder why ShellÂ’s TOTL diesel oil has such a low API rating that is actually obsolete and not recommended for diesel engines built from 2009 onwards.

[diehard]

Shell has Helix Ultra for gasoline engines (0w40, 5w30, 5w40) and Shell Helix Ultra Diesel 5w40. Shell Helix Ultra Diesel is rated API CF, ACEA A3/B3, ACEA A3/B4. Most modern diesel engines require at least API Ci-4 which in turn has already been superseded by CJ-4 and CK-4. Which is why I wonder why ShellÂ’s TOTL diesel oil has such a low API rating that is actually obsolete and not recommended for diesel engines built from 2009 onwards.

Just to add, most Jap brands use API when specifying motor oil.

[StockEngine]

Shell has Helix Ultra for gasoline engines (0w40, 5w30, 5w40) and Shell Helix Ultra Diesel 5w40. Shell Helix Ultra Diesel is rated API CF, ACEA A3/B3, ACEA A3/B4. Most modern diesel engines require at least API Ci-4 which in turn has already been superseded by CJ-4 and CK-4. Which is why I wonder why ShellÂ’s TOTL diesel oil has such a low API rating that is actually obsolete and not recommended for diesel engines built from 2009 onwards.

shell rotella is their diesel stuff...