Frequently Asked Questions


Can I mixed synthetic oil with mineral oil?
In most cases mineral oils can be mixed with semi-synthetic or full synthetic oils. Gulf Western’s range of mineral, semi-synthetic and full synthetic engine oils can be mixed. In some cases, synthetic esters and PAG grades cannot be mixed with other grades. If you are unsure, please give Gulf Western technical a call.

What does API and ACEA stand for?
API – American Petroleum Institute & ACEA – Association des Constructeurs Europeans d’Automobiles (the European Automobile Manufacturers Association)

What does Zinc do in an engine oil?
Over the years there has been a lot of misinformation about zinc. Zinc, or zinc dialkyldithiophosphate is a compound that was introduced over 70 years ago as an anti wear additive to engine oils. In recent years, there has been considerable pressure to reduce zinc levels in engine oils. In part because they are (in higher concentration) not compatible with diesel particulate filters and catalytic converters, and in part because of concerns of long term human toxicity. Modern oil formulations are trending towards much lower levels of zinc and other anti-wear additives and friction modifiers have been introduced.  

What does it mean when my diesel engine oil goes black?
The black colour in oil is from soot (unburnt carbon) produced when diesel is burnt in an engine. The oil should go black as it disperses and suspends the soot. If not held in a finely dispersed form by the oil, the soot particles would stick together forming sludge that could block oil-ways. This is overcome by the dispersant additives in the oil. Additionally detergent additives prevent soot from building up on metal surfaces (like a non-stick coating on a fry pan).

One of the major concerns in modern engines is wear to bearings, cam lobes, followers and rockers from the abrasive effects of soot particles joining together. Hence engine manufacturers specify limits for soot in used oil and that the oil still has enough detergency to stop the soot sticking to metal components.

Essentially the oil is doing its job. If an oil takes time to go black it is not performing as well as an oil that goes black quickly.

Modern low emission engines produce more soot than their predecessors. This is particularly so if fitted with Exhaust Gas Recirculation (EGR). It is the job of the oil to hold that soot in a finely dispersed form. An API CJ-4 oil such as Top Dog Global Plus or Top Dog Global Mineral, can safely hold 4% soot. In a 50 litre sump this is 2kg of soot! No wonder it will go black. This shows how good the oil is and how well it protects your engine.

DILUTIONS

What dilution rate do I use for soluble cutting oil?
3% to 10% depending upon the application

What dilution rate do I use for All Fleet Diesel coolant concentrate?
50%

What dilution rate do I use for Gulf 90+ Antifreeze?
33% to 50% (1:2 to 1:1)

VISCOSITY GRADES

What viscosity grade is Air Tool Oil?
ISO 32

What viscosity grade is Hydraulic Jack Oil?
ISO 32

What viscosity grade does Vacuum Pump Oil come in?
ISO 46, ISO 68 and ISO 100

BUSINESS

Is Gulf Western Australian owned?
Gulf Western Oil is fully Australian owned and operated.

ENGINE EMISSIONS

What is a diesel particulate filter (DPF)?
A diesel particulate filter is a device designed to remove diesel particulate matter or soot from the exhaust gas of a diesel engine.

Where would I find it if I have one?
The most commonly fitted type of DPF is located very close to the engine where exhaust gases will still be hot. Check with the car manufacturer or manual for the location of your DPF.

What products can I use if I have a Diesel Particulate Filter?
You can only use products that have a low Sulphated Ash, Phosphorus and Sulfur (SAPS) content.

What does Clearonox do?
The urea in Clearonox decomposes into ammonia to react with exhaust gases with a catalytic converter. The oxides of nitrogen in the exhaust gases react with the ammonia and are then turned into harmless nitrogen and water. This process is called Selective Catalytic Reduction.

PRODUCTS

What is the difference between Top Dog Global Plus (30013) and Top Dog Global Mineral (30018)?
Top Dog Global Plus is an API 10w40 semi-synthetic low SAPS product that can be used with DPFs. Top Dog Global Mineral is an API 15w40 mineral low SAPS product that can be used with DPFs. Both products meet the CJ-4 diesel specification.

What is the difference between a mineral and a synthetic oil?
Mineral oil comes from distilling crude oil and contains a mixture of many different distillate products of different weights. Synthetic oil has either been highly refined to remove as many variations as possible or completely constructed to contain a much purer mix of molecules, giving both better heat transfer and surface protection.

What products do Gulf Western make that are synthetic based?
Gulf Western makes both fully synthetic and semi-synthetic products.

The following products are fully synthetic:

ENGINE OILS:

  • EURO ENERGY 5W30 ACEA C3
  • EURO FORCE 5W30 ACEA C4
  • EURO ULTRA 5W30 ACEA C1
  • ENERGY PLUS 5W30 VW 504/507
  • SYN-X 7000 5W30 FORD WSS-M2C-913D
  • SYN ENERGY 5W30 SN/ILSAC GF-5
  • SYN-X 6000 5W40 SN/CF
  • EURO SYN 10W40 CI4/SJ
  • SYNFLEET MX 10W40 CJ4/SM
  • GULF 1 10W60 SN/CF

GEAR OILS:

  • ULTRA CLEAR 75W90
  • ULTRA CLEAR 80W140
  • ULTRA CLEAR LS90
  • ULTRA DRIVE 90
  • LOW VIS PLUS 75W85
  • SYN GEAR 100, 150, 220, 320, 460

TRANSMISSION OILS:

  • SYN-TS
  • SYN-CVT
  • SYNTORQUE 50

OTHER

  • ULTRA CLEAR COMPRESSOR 46
  • ULTRA CLEAR COMPRESSOR 68

The following products are semi-synthetic: 

ENGINE OILS:

  • SYN-X 3000 10W40 SN FORD WSS-M2C-945A/946A
  • SYN-X 4000 5W30 SN/ILSAC GF-5
  • PREMIUM ENERGY 10W30 SN/ILSAC GF-5
  • PROTECTA ULTRA 15W50 SL/CF
  • TOP DOG GLOBAL PLUS 10W40 CJ4/SM

TIMELINE OF SPECIFICATION RELEASES

Please click here to see a Timeline of specification releases.

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