Shell Helix H7 5W-30 Semi Synthetic Engine Oil - It is really fuel economy as claimed by shell?

All these while I've been using Perodua 5W-30 semi synthetic engine oil for the past 12 years. Coincidentally there was a promotion for Shell Helix H7 5w-30 semi synthetic by a petrol station and it was RM20+ cheaper than perodua semi synthetic oil. So why not and got one bottle 4 Litres for a trial. 

To my surprise the shell helix h7 5w-30 which is less viscosity than the Perodua really does more fuel economy. The old alza has been consuming average of 12.3 L/100km using Perodua engine oil but the shell helix is able to reduce around 11.6 L/100km for city driving and 11.2 L/100km long distance journey. That is trully incredible an engine oil could really have significant impact to the fuel economy. 

Apart from that the engine feel lighter and easily pick up quickly - less hesitation. This is from personal experience and probably won't work on cars that is already have good fuel economy average but for an older car that have been consuming fuel, the shell helix h7 5w-30 probably could help. The normal price probably way more expensive than perodua semi synthetic but you are compensated on the day-to-day fuel consumptions over a time span of 6 months before the next engine oil change. If you calculate the cumulative saving on fuel probably outweigh the price of the shell helix h7. 

So that's all my honest review from an experience using the Shell Helix H7 5W30 semi synthetic for the first time. The next engine oil change probably I will still go for it despite of the price since I can save more on daily fuel consumptions. 

NS40ZL battery cold crank amps (CCA) ratings

Amaron NS40ZL CCA Ratings = 265A

Panasonic NS40ZL CCA Ratings = 301A

Century NS40ZL CCA Ratings = 308A

Yokohama NS40ZL CCA Ratings = 370A

GP MF Gold NS40ZL CCA Ratings = 300A

Hyundai NS40ZL CCA Ratings = 330A

ACDelco NS40ZL CCA Ratings = 340A

Bosch NS40ZL CCA Ratings = 300A

Supercharge NS40ZL CCA Ratings = 330A

GS Yuasa NS40ZL CCA Ratings = 380A

Varta NS40ZL CCA Ratings = 272A

CCA stands for Cold Crank Amps which is the capacity of the battery that it can output to crank a car. Most of the CCA ratings are actually not exactly but estimates and each brand has its own rating. The theory is the higher the CCA the more charge it store and capable of cranking heavier engines. Most of the standard 12V lead acid battery CCA ratings usually around 500A+. Thus Alza actually consider as smaller engine as it uses NS40ZL battery which is average around 270A ~ 350A. 

Spray paint layers' sequence

Car plastic material - Primer --> undercoat primer ---> sanding ---> color paint --> clear coat (samurai)

Bare Metal - Etch primer --> primer --> undercoat primer ---> sanding ---> color paint --> clear coat

Old alza 2010 white color code W09 ivory white or milky white 

Plastic primer 737 (sandable) or X1 samurai plastic primer

Car Engine Unable to Kick Start Diagnosis

These are some of the problems to look for when car won't start / crank.

1. Check the battery - note that even at normal voltage like 12.5 ~ 12.7 volts there is a possibility that it won't be able to start a car. That's why mere a multimeter device won't help in this case. You need a real battery health checker to check the health and capacity of current it still holds.

2. Grounding cable - grounding cable can be a problem especially that leading to a starter / crank motor. It can be damaged (burnt) due to aging and frequent high current delivered to the starter. 

3. Fuse - check each of the fuse for continuity using a multimeter device.

4. Faulty fuel pump relay - use visual inspection first to check sign of burnt or damage. And interchange with other existing relay for testing purposes and start.

5. Ignition switch - faulty ignition switch also can lead to car won't start.

6. Bad fuel pump / spark plugs wiring

7. Faulty fuel pump / spark plugs

8. Faulty crankshaft and camshaft position sensors as well as their wiring could also prevent a car from starting.

9. Automatic transmission if it the gear on D (Drive) it also won't start the car. Shift it back to P or N and start again.